Always pass list of languages as a tuple

examples/check_czech.py

@@ -38,6 +38,6 @@ class PluralCzechCheck(TargetCheck):
 
     # Real check code
     def check(self, sources, targets, unit):
-        if self.is_language(unit, ['cs']):
+        if self.is_language(unit, ('cs', )):
             return targets[1] == targets[2]
         return False

weblate/trans/checks/chars.py

@@ -90,7 +90,7 @@ class EndSpaceCheck(TargetCheck):
             return False
         if not source or not target:
             return False
-        if self.is_language(unit, ['fr', 'br']):
+        if self.is_language(unit, ('fr', 'br')):
             if source[-1] in [':', '!', '?'] and target[-1] == ' ':
                 return False
 
@@ -135,7 +135,7 @@ class EndStopCheck(TargetCheck):
             return self.check_chars(
                 source, target, -1, (u';', u':', u'：', u'.', u'。')
             )
-        if self.is_language(unit, ['hi', 'bn']):
+        if self.is_language(unit, ('hi', 'bn')):
             # Using | instead of । is not typographically correct, but
             # seems to be quite usual
             return self.check_chars(

weblate/trans/checks/same.py

@@ -916,7 +916,7 @@ class SameCheck(TargetCheck):
 
     def check_single(self, source, target, unit, cache_slot):
         # English variants will have most things not translated
-        if self.is_language(unit, ['en']):
+        if self.is_language(unit, ('en', )):
             return False
 
         # One letter things are usually labels or decimal/thousand separators