diff --git a/themator/cs/backend.json b/themator/cs/backend.json
index 932cb02a..b25efc1a 100644
--- a/themator/cs/backend.json
+++ b/themator/cs/backend.json
@@ -1,107 +1,107 @@
 {
     "backend_tl": {
-        "input_interface": "Input Interface",
-        "topics": "Topics",
-        "add": "Add",
-        "delete": "Delete",
-        "users": "Users",
-        "edit": "Edit",
-        "logged_in_as": "Logged in as",
-        "logout": "Log out",
-        "topic": "Topic",
-        "selectmuseumforediting": "Select a museum for editing ...",
-        "museum_edit": "Edit a museum ...",
-        "museum_add": "Add a museum ...",
-        "collection_select": "Select a collection for editing ...",
-        "collection_edit": "Edit a collection ...",
-        "collection_add": "Add a collection ...",
-        "object_select": "Select an object for editing ...",
-        "object_edit": "Edit an object ...",
-        "object_add": "Add an object ...",
-        "ufo_edit": "Edit a U-F-O ...",
-        "ufo_add": "Add a U-F-O ...",
-        "event_select": "Select an event for editing ...",
-        "event_edit": "Edit an event ...",
-        "event_add": "Add an event ...",
-        "time_select": "Select a time term for editing ...",
-        "time_edit": "Edit a time term ...",
-        "time_add": "Add a time term ...",
-        "persinst_select": "Select an actor for editing ...",
-        "persinst_edit": "Edit an actor ...",
-        "persinst_add": "Add an actor ...",
-        "place_select": "Select a place for editing ...",
-        "place_edit": "Edit a place ...",
-        "place_add": "Add a place ...",
-        "tag_select": "Select a keyword for editing ...",
-        "tag_edit": "Edit a keyword...",
-        "tag_add": "Add a keyword...",
-        "literature_select": "Select a literature entry for editing ...",
-        "literature_edit": "Edit a literature entry ...",
-        "literature_add": "Add a literature entry ...",
-        "link_select": "Select a hyperlink for editing ...",
-        "link_edit": "Edit hyperlink",
-        "link_add": "Add hyperlink",
-        "image_edit": "Select an image for editing ...",
-        "document_attach": "Attach a document ...",
-        "tag_select_simple": "Please select a keyword...",
-        "settings_edit": "Edit settings ...",
-        "user_select": "Select a user for editing ...",
-        "topic_edit": "Edit a <b style=\"color:#3333aa;\">topic<\/b>",
-        "subtopic_edit": "Add a <b style=\"color:#3333aa;\">lower level topic<\/b>",
-        "document_edit": "Edit document",
-        "source_add": "Add link with a source",
-        "object_add_complicated": "Add an <b style=\"color:#3333aa;\">object<\/b>",
-        "object_edit_complicated": "Edit an <b style=\"color:#3333aa;\">object entry<\/b>",
-        "user_role_change_alt": "Changes the relation between a user and a topic",
-        "send": "Send",
-        "once_again": "Once again",
-        "field": "Field",
-        "definitelyconfirm": "Yes!!",
-        "explanation_short_title": "<b>Field \"Short Title\"<\/b><br><br>This field is mandatory!<br><br>The short title is used for listing the entry in the navigation<br><br>Example 1: \"Archaology of the Lords of Anhalt\"<br>Example 2: \"Excavations\"",
-        "explanation_long_title": "<b>Field: \"Long Title\"<\/b><br><br>This field is mandatory!<br><br>The \"long title\" is the actual title of the topic. At best, it is not more than 150 characters.<br><br>Example: \"Archeology of the Anhalt princes from the 15th century to modern day",
-        "explanation_abstract": "<b>Field: \"Abstract\"<\/b><br><br>This field is mandatory!<br><br>Ideally a sentence, that summarizes the topic's contents.",
-        "explanation_text": "<b>Field: \"Image Text\"<\/b><br><br>This field is mandatory!<br><br>Unrestricted length of text. Ideally, the text fills about one screen. If possible, write sentences and avoid lists.<br><br>You can - but are not required to - upload an image for the topic. The image will appear on the left of the text.",
-        "explanation_text_image": "<b>Field: \"Image Text\"<\/b><br><br>Please only fill this out, if you have uploaded an image for the topic. This text appears upon hovering over the image. Useful for information on copyright and origin.",
-        "explanation_link_image": "<b>Field: \"Target for click on image\"<\/b><br><br>Please only fill this out if you have uploaded an image for the topic and want the user to be linked to another source on the web upon clicking on the image.<br><br>Requires absolute URLs, beginning with \"http(s):\/\/\".",
-        "topic_image": "Image for topic:",
-        "topic_image_switch": "Change image",
-        "topic_image_noimage": "No image available",
-        "topic_image_upload": "Upload image",
-        "map": "Map",
-        "topic_map_disabled": "Show topic without a map",
-        "topic_map_enabled": "Display topic with a map (objects of the topic on a map)",
-        "topic_map_enabled_inclusive": "Display topic with a map (objects of the topic and all lower level topics on a map)",
-        "short_title": "Short Title",
-        "long_title": "Long Title",
-        "abstract": "Abstract",
-        "text_for_topic": "Text on the Topic",
-        "text_for_image": "Image Text",
-        "link_image": "Target for Clicking on Image",
-        "topic_presentation": "Presentation",
-        "topic_background": "Background: ",
-        "topic_ballon_form": "Bubble form: ",
-        "topic_tooltip": "Tool-Tip: ",
-        "required_short_title": "You need to enter a short title!",
-        "required_long_text": "You need to enter a more extensive title!",
-        "required_text": "A text is required for a topic!",
-        "error_morethanonetopic": "Encountered more than one topic ... Something must have gone wrong",
-        "add_higher_level_topic": "Add higher level topic",
-        "add_higher_level_topic_alt": "Links with a higher level topic",
-        "add_higher_level_topic_alt_additional": "Add link to another higher level topic",
-        "edit_higher_level_topic": "Edit higher level topic",
-        "add_lower_level_topic": "Add lower level topic",
-        "add_lower_level_topic_alt": "Link a lower level topic",
-        "add_lower_level_topic_alt_additional": "Link to a lower level topic",
+        "input_interface": "Vstupn\u00ed rozhran\u00ed",
+        "topics": "T\u00e9mata",
+        "add": "P\u0159idat",
+        "delete": "Vymazat",
+        "users": "U\u017eivatel\u00e9",
+        "edit": "U\u017eivatel\u00e9",
+        "logged_in_as": "P\u0159ihl\u00e1\u0161en\/a jako",
+        "logout": "Odhl\u00e1sit se",
+        "topic": "T\u00e9ma",
+        "selectmuseumforediting": "Vyberte muzeum k \u00faprav\u011b...",
+        "museum_edit": "Upravit muzeum ...",
+        "museum_add": "P\u0159idat muzeum...",
+        "collection_select": "Vyberte kolekci k \u00faprav\u011b...",
+        "collection_edit": "Upravit kolekci...",
+        "collection_add": "P\u0159idat kolekci...",
+        "object_select": "Vyberte objekt k \u00faprav\u011b...",
+        "object_edit": "Upravit objekt ...",
+        "object_add": "P\u0159idat objekt...",
+        "ufo_edit": "Upravit UFO ...",
+        "ufo_add": "P\u0159idejte UFO...",
+        "event_select": "Vyberte ud\u00e1lost k \u00faprav\u011b...",
+        "event_edit": "Upravit ud\u00e1lost...",
+        "event_add": "P\u0159idat ud\u00e1lost...",
+        "time_select": "Vyberte \u010das pro \u00fapravu...",
+        "time_edit": "Upravit \u010dasov\u00fd \u00fasek ...",
+        "time_add": "P\u0159idat \u010dasov\u00fd limit...",
+        "persinst_select": "Vyberte herce pro editaci...",
+        "persinst_edit": "Upravit herce...",
+        "persinst_add": "P\u0159idat herce...",
+        "place_select": "Vyberte m\u00edsto pro \u00fapravy...",
+        "place_edit": "Upravit m\u00edsto...",
+        "place_add": "P\u0159idat m\u00edsto...",
+        "tag_select": "Vyberte kl\u00ed\u010dov\u00e9 slovo k \u00faprav\u011b...",
+        "tag_edit": "Upravit kl\u00ed\u010dov\u00e9 slovo...",
+        "tag_add": "P\u0159idat kl\u00ed\u010dov\u00e9 slovo...",
+        "literature_select": "Vyberte liter\u00e1rn\u00ed polo\u017eku k \u00faprav\u011b...",
+        "literature_edit": "Upravit liter\u00e1rn\u00ed z\u00e1znam...",
+        "literature_add": "P\u0159idat liter\u00e1rn\u00ed z\u00e1znam...",
+        "link_select": "Vyberte hypertextov\u00fd odkaz pro \u00fapravu...",
+        "link_edit": "Upravit hypertextov\u00fd odkaz",
+        "link_add": "P\u0159idat hypertextov\u00fd odkaz",
+        "image_edit": "Vyberte obr\u00e1zek k \u00faprav\u011b...",
+        "document_attach": "P\u0159ilo\u017eit dokument...",
+        "tag_select_simple": "Vyberte pros\u00edm kl\u00ed\u010dov\u00e9 slovo...",
+        "settings_edit": "Upravit nastaven\u00ed...",
+        "user_select": "Vyberte u\u017eivatele k \u00faprav\u011b...",
+        "topic_edit": "Upravit <b style=\"color:#3333aa;\">t\u00e9ma<\/b>",
+        "subtopic_edit": "P\u0159idat <b style=\"color:#3333aa;\">t\u00e9ma ni\u017e\u0161\u00ed \u00farovn\u011b<\/b>",
+        "document_edit": "Upravit dokument",
+        "source_add": "P\u0159idat odkaz se zdrojem",
+        "object_add_complicated": "P\u0159idat <b style=\"color:#3333aa;\">objekt<\/b>",
+        "object_edit_complicated": "Upravit na <b style=\"color:#3333aa;\">z\u00e1znam objektu<\/b>",
+        "user_role_change_alt": "Zm\u011bn\u00ed vztah mezi u\u017eivatelem a t\u00e9matem",
+        "send": "Poslat",
+        "once_again": "Je\u0161t\u011b jednou",
+        "field": "Pole",
+        "definitelyconfirm": "Ano!!",
+        "explanation_short_title": "<b>Pole \u201eKr\u00e1tk\u00fd n\u00e1zev\u201c<\/b><br><br>Toto pole je povinn\u00e9!<br><br>Kr\u00e1tk\u00fd n\u00e1zev se pou\u017e\u00edv\u00e1 pro uveden\u00ed polo\u017eky v navigaci<br><br>P\u0159\u00edklad 1: \u201eArcheologie p\u00e1n\u016f z Anhaltska\u201c<br>P\u0159\u00edklad 2: \u201eVykop\u00e1vky\u201c",
+        "explanation_long_title": "<b>Pole: \u201eDlouh\u00fd n\u00e1zev\u201c<\/b><br><br>Toto pole je povinn\u00e9!<br><br>\u201eDlouh\u00fd n\u00e1zev\u201c je skute\u010dn\u00fd n\u00e1zev t\u00e9matu. V nejlep\u0161\u00edm p\u0159\u00edpad\u011b nep\u0159esahuje 150 znak\u016f.<br><br>P\u0159\u00edklad: \u201eArcheologie anhaltsk\u00fdch kn\u00ed\u017eat od 15. stolet\u00ed do sou\u010dasnosti\u201c",
+        "explanation_abstract": "<b>Pole: \u201eAbstrakt\u201c<\/b><br><br>Toto pole je povinn\u00e9!<br><br>Ide\u00e1ln\u011b v\u011bta, kter\u00e1 shrnuje obsah t\u00e9matu.",
+        "explanation_text": "<b>Pole: \u201eText obr\u00e1zku\u201c<\/b><br><br>Toto pole je povinn\u00e9!<br><br>Neomezen\u00e1 d\u00e9lka textu. V ide\u00e1ln\u00edm p\u0159\u00edpad\u011b by text m\u011bl vyplnit p\u0159ibli\u017en\u011b jednu obrazovku. Pokud je to mo\u017en\u00e9, pi\u0161te v\u011bty a vyh\u00fdbejte se seznam\u016fm.<br><br>M\u016f\u017eete \u2013 ale nemus\u00edte \u2013 nahr\u00e1t obr\u00e1zek k t\u00e9matu. Obr\u00e1zek se zobraz\u00ed vlevo od textu.",
+        "explanation_text_image": "<b>Pole: \u201eText obr\u00e1zku\u201c<\/b><br><br>Vypl\u0148te pros\u00edm pouze v p\u0159\u00edpad\u011b, \u017ee jste k t\u00e9matu nahr\u00e1li obr\u00e1zek. Tento text se zobraz\u00ed po najet\u00ed my\u0161\u00ed na obr\u00e1zek. U\u017eite\u010dn\u00e9 pro informace o autorsk\u00fdch pr\u00e1vech a p\u016fvodu.",
+        "explanation_link_image": "<b>Pole: \u201eC\u00edl pro kliknut\u00ed na obr\u00e1zek\u201c<\/b><br><br>Vypl\u0148te pros\u00edm toto pole pouze v p\u0159\u00edpad\u011b, \u017ee jste k t\u00e9matu nahr\u00e1li obr\u00e1zek a chcete, aby byl u\u017eivatel po kliknut\u00ed na obr\u00e1zek p\u0159esm\u011brov\u00e1n na jin\u00fd zdroj na webu.<br><br>Vy\u017eaduje absolutn\u00ed adresy URL za\u010d\u00ednaj\u00edc\u00ed \u201ehttp(s):\/\/\u201c.",
+        "topic_image": "Obr\u00e1zek k t\u00e9matu:",
+        "topic_image_switch": "Zm\u011bnit obr\u00e1zek",
+        "topic_image_noimage": "\u017d\u00e1dn\u00fd obr\u00e1zek k dispozici",
+        "topic_image_upload": "Nahr\u00e1t obr\u00e1zek",
+        "map": "Mapa",
+        "topic_map_disabled": "Zobrazit t\u00e9ma bez mapy",
+        "topic_map_enabled": "Zobrazit t\u00e9ma s mapou (objekty t\u00e9matu na map\u011b)",
+        "topic_map_enabled_inclusive": "Zobrazit t\u00e9ma s mapou (objekty t\u00e9matu a v\u0161echna t\u00e9mata ni\u017e\u0161\u00ed \u00farovn\u011b na map\u011b)",
+        "short_title": "Kr\u00e1tk\u00fd n\u00e1zev",
+        "long_title": "Dlouh\u00fd n\u00e1zev",
+        "abstract": "Abstraktn\u00ed",
+        "text_for_topic": "Text k t\u00e9matu",
+        "text_for_image": "Obr\u00e1zek Text",
+        "link_image": "C\u00edl pro kliknut\u00ed na obr\u00e1zek",
+        "topic_presentation": "Prezentace",
+        "topic_background": "Pozad\u00ed:",
+        "topic_ballon_form": "Tvar bubliny:",
+        "topic_tooltip": "Popisek:",
+        "required_short_title": "Mus\u00edte zadat kr\u00e1tk\u00fd n\u00e1zev!",
+        "required_long_text": "Mus\u00edte zadat rozs\u00e1hlej\u0161\u00ed n\u00e1zev!",
+        "required_text": "K t\u00e9matu je vy\u017eadov\u00e1n text!",
+        "error_morethanonetopic": "Narazil jsem na v\u00edce ne\u017e jedno t\u00e9ma... N\u011bco se muselo pokazit.",
+        "add_higher_level_topic": "P\u0159idat t\u00e9ma vy\u0161\u0161\u00ed \u00farovn\u011b",
+        "add_higher_level_topic_alt": "Odkazy na t\u00e9ma vy\u0161\u0161\u00ed \u00farovn\u011b",
+        "add_higher_level_topic_alt_additional": "P\u0159idat odkaz na dal\u0161\u00ed t\u00e9ma vy\u0161\u0161\u00ed \u00farovn\u011b",
+        "edit_higher_level_topic": "Upravit t\u00e9ma vy\u0161\u0161\u00ed \u00farovn\u011b",
+        "add_lower_level_topic": "P\u0159idat t\u00e9ma ni\u017e\u0161\u00ed \u00farovn\u011b",
+        "add_lower_level_topic_alt": "Propojit t\u00e9ma ni\u017e\u0161\u00ed \u00farovn\u011b",
+        "add_lower_level_topic_alt_additional": "Odkaz na t\u00e9ma ni\u017e\u0161\u00ed \u00farovn\u011b",
         "edit_lower_level_topic": "Edit lower level topics",
-        "delete_relation": "Delete relation",
-        "document_add": "Add a link to a document!",
-        "document_add_simple": "Add document",
-        "source_add_simple": "Add source",
-        "source_edit": "Edit source",
-        "link_add_simple": "Add a hyperlink",
-        "topics_object_add": "Add a link with an object!",
-        "topics_object_add_simple": "Link an object!",
-        "topics_select_from_list_to_edit": "Change the topic. Please select the topic.",
+        "delete_relation": "Smazat vztah",
+        "document_add": "P\u0159idejte odkaz na dokument!",
+        "document_add_simple": "P\u0159idat dokument",
+        "source_add_simple": "P\u0159idat zdroj",
+        "source_edit": "Upravit zdroj",
+        "link_add_simple": "Upravit zdroj",
+        "topics_object_add": "P\u0159idejte odkaz s objektem!",
+        "topics_object_add_simple": "Odkaz na objekt!",
+        "topics_select_from_list_to_edit": "Zm\u011b\u0148te t\u00e9ma. Vyberte pros\u00edm t\u00e9ma.",
         "list_of_topics_to_be_deleted": "List of topics, that you can delete:",
         "can_add_new_user": "You may add a new user: ",
         "list_all_users": "List of All Users",
@@ -222,4 +222,4 @@
         "object_list_setting_button_images_only": "Display objects below the topic's text only using their thumbnails. Preview object metadata appears in a tooltip when hovering over the images (regular Themator mode only).",
         "object_list_setting_button_large_images_only": "Display objects below the topic's text only using large thumbnails. Preview object metadata appears in a tooltip when hovering over the images (regular Themator mode only)."
     }
-}
+}
\ No newline at end of file