[languages] Earlier exit on finding ambiguous script spans

scripts/geodata/language_id/disambiguation.py

@@ -208,13 +208,13 @@ def disambiguate_language(text, languages):
                 elif len(valid_default) == 1:
                     current_lang = valid_default[0]
 
+            if any((current_lang not in langs for script, langs in script_langs.iteritems())):
+                return AMBIGUOUS_LANGUAGE
+
             seen_languages.update(valid)
 
     if current_lang is not None:
-        if not any((current_lang not in langs for script, langs in script_langs.iteritems())):
-            return current_lang
-        else:
-            return AMBIGUOUS_LANGUAGE
+        return current_lang
     elif possible_lang is not None:
         if not any((possible_lang not in langs for script, langs in script_langs.iteritems())):
             return possible_lang

scripts/geodata/tests/test_disambiguation.py

@@ -52,7 +52,7 @@ country_test_cases = [
     ('128 A St.', 'ae', 'en'),
 
     # English / Arabic street address
-    ('Omar Street ﺵﺍﺮﻋ ﻊﻣﺭ', 'iq', AMBIGUOUS_LANGUAGE),
+    ('Omar Street شارع عمر', 'iq', AMBIGUOUS_LANGUAGE),
 
     # Random script
     ('Bayard Street - 擺也街', 'us', AMBIGUOUS_LANGUAGE),