diff --git a/src/NodaWikidataFetcher.php b/src/NodaWikidataFetcher.php
index 6500fbf..63a84d8 100644
--- a/src/NodaWikidataFetcher.php
+++ b/src/NodaWikidataFetcher.php
@@ -90,7 +90,7 @@ final class NodaWikidataFetcher {
     /**
      * Attempts to fetch a Wikidata ID from a provided URL.
      *
-     * @param string $linkUrl Link to a page.
+     * @param non-empty-string $linkUrl Link to a page.
      *
      * @return string
      */
@@ -138,7 +138,7 @@ final class NodaWikidataFetcher {
     /**
      * Attempts to fetch a Wikidata ID from a provided URL.
      *
-     * @param string $linkUrl Link to a Wikipedia page.
+     * @param non-empty-string $linkUrl Link to a Wikipedia page.
      *
      * @return string
      */
@@ -169,15 +169,15 @@ final class NodaWikidataFetcher {
         }
         $t_wikibase = (string)$t_wikibase_href;
 
-        if (!empty($t_wikibase)) {
-            if (($wikidata_id_end = strrpos($t_wikibase, '/')) !== false) {
-                $wikidata_id = trim(substr($t_wikibase, $wikidata_id_end + 1), '/');
+        // if (!empty($t_wikibase)) {
+        if (($wikidata_id_end = strrpos($t_wikibase, '/')) !== false) {
+            $wikidata_id = trim(substr($t_wikibase, $wikidata_id_end + 1), '/');
 
-                if (substr($wikidata_id, 0, 1) === 'Q') {
-                    return $wikidata_id;
-                }
+            if (substr($wikidata_id, 0, 1) === 'Q') {
+                return $wikidata_id;
             }
         }
+        // }
 
         return '';
 
@@ -279,7 +279,7 @@ final class NodaWikidataFetcher {
      * @param array<string> $checkagainstLanguage The language to check against.
      * @param array<mixed>  $data                 Data fetched from Wikidata.
      *
-     * @return array<array<string>>
+     * @return array{0: array<string, non-empty-string>, 1: array<string, string>}
      */
     public static function getWikidataWikipediaTranslationSources(array $checkagainstLanguage, array $data) {
 
@@ -477,12 +477,11 @@ final class NodaWikidataFetcher {
         // Cut off overly long articles
         if (mb_strlen($input) > 600) {
             if (strpos($input, PHP_EOL . PHP_EOL, 600) !== false) {
-                $input = substr($input, 0, strpos($input, PHP_EOL . PHP_EOL, 600));
+                $input = trim(substr($input, 0, strpos($input, PHP_EOL . PHP_EOL, 600)));
             }
         }
 
-        // Trim again to make really, really no superfluous whitespaces remain
-        $input = trim($input);
+        if (empty($input)) return '';
 
         $input = str_replace("'", "´", MD_STD::preg_replace_str("/\&\#91\;[0-9]\&\#93\;/", '', $input));
 
@@ -814,13 +813,14 @@ final class NodaWikidataFetcher {
      *
      * @return void
      */
-    public function getWikidataTranslationsForPersinst(array $data, int $persinst_id) {
+    public function getWikidataTranslationsForPersinst(array $data, int $persinst_id):void {
 
         $checkagainstLanguage = self::LANGUAGES_TO_CHECK;
 
-        $insertStmt = $this->_mysqli_noda->do_prepare("CALL nodaInsertPersinstTranslation(?, ?, ?, ?, ?)");
-
         list($languagesToFetch, $wikilinks) = self::getWikidataWikipediaTranslationSources($checkagainstLanguage, $data);
+        if (empty($languagesToFetch)) {
+            return;
+        }
 
         try {
             $contents = MD_STD::runCurlMulti($languagesToFetch, 10000);
@@ -829,6 +829,8 @@ final class NodaWikidataFetcher {
             throw new MDExpectedException("Failed to initialize a request. Try pressing F5 to run the requests again.");
         }
 
+        $insertStmt = $this->_mysqli_noda->do_prepare("CALL nodaInsertPersinstTranslation(?, ?, ?, ?, ?)");
+
         $this->_mysqli_noda->autocommit(false);
 
         foreach ($checkagainstLanguage as $lang) {
@@ -1220,6 +1222,9 @@ final class NodaWikidataFetcher {
         $checkagainstLanguage = self::LANGUAGES_TO_CHECK;
 
         list($languagesToFetch, $wikilinks) = self::getWikidataWikipediaTranslationSources($checkagainstLanguage, $data);
+        if (empty($languagesToFetch)) {
+            return;
+        }
 
         try {
             $contents = MD_STD::runCurlMulti($languagesToFetch, 10000);
@@ -1542,9 +1547,10 @@ final class NodaWikidataFetcher {
 
         $checkagainstLanguage = self::LANGUAGES_TO_CHECK;
 
-        $insertStmt = $this->_mysqli_noda->do_prepare("CALL nodaInsertTagTranslation(?, ?, ?, ?, ?)");
-
         list($languagesToFetch, $wikilinks) = self::getWikidataWikipediaTranslationSources($checkagainstLanguage, $data);
+        if (empty($languagesToFetch)) {
+            return;
+        }
 
         try {
             $contents = MD_STD::runCurlMulti($languagesToFetch, 10000);
@@ -1553,6 +1559,8 @@ final class NodaWikidataFetcher {
             throw new MDExpectedException("Failed to initialize a request. Try pressing F5 to run the requests again.");
         }
 
+        $insertStmt = $this->_mysqli_noda->do_prepare("CALL nodaInsertTagTranslation(?, ?, ?, ?, ?)");
+
         $this->_mysqli_noda->autocommit(false);
 
         foreach ($checkagainstLanguage as $lang) {