Fixed installer translations search

source/ubinstall-gtk-ui-lang.c

@@ -131,12 +131,18 @@ int yon_char_parsed_compare(const void *a, const void *b){
 }
 
 gboolean on_languages_search_func(GtkTreeModel *model, gint ,const char *key, GtkTreeIter *iter, main_window *){
-    char *language, *language_localised;
-    gtk_tree_model_get(model,iter,1,&language,4,&language_localised,-1);
-    if (strstr(language,key)||strstr(language_localised,key)){
-        return 0;
-    }
-    return 1;
+    char *target;
+    char *loc_target;
+    gtk_tree_model_get(model, iter, 1,&target, 4, &loc_target,-1);
+    char *string_utf = g_utf8_casefold(key,-1);
+    char *target_utf = g_utf8_casefold(target,-1);
+    char *loc_target_utf = g_utf8_casefold(loc_target,-1);
+
+    char *string_normalized = g_utf8_strdown(g_utf8_normalize(string_utf,-1,G_NORMALIZE_DEFAULT),-1);
+    char *target_normalized = g_utf8_strdown(g_utf8_normalize(target_utf,-1,G_NORMALIZE_DEFAULT),-1);
+    char *loc_target_normalized = g_utf8_strdown(g_utf8_normalize(loc_target_utf,-1,G_NORMALIZE_DEFAULT),-1);
+
+    return !(g_str_has_prefix(target_normalized,string_normalized) || g_str_has_prefix(loc_target_normalized,string_normalized));
 }
 
 void set_locales_list(main_window *widgets){