[Type tester] Languages without sample text in show other script

#This issue also works for requesting features.

Selecting Continent/Languages that don’t have samples available in the type tester shows random scripts sometimes.

**To Reproduce**
Select Africa/Asu and Bulgarian samples in Cyrillic alphabet are shown.

The following message is displayed:
> Unfortunately, there is no sample text for Asu. However, there is sample text in Bulgarian, English and others using Cyrillic and Latin.
> Google Fonts sources sample text from the Universal Declaration of Human Rights (UDHR) and there is no translation of the UDHR using Asu.

**Expected behavior**
Don’t list Asu in the specimen or type tester or show a language sharing the same or similar Latin character set with the current waring instead of a random Cyrillic Bulgarian character set.

**Screenshots**