Where are line in Names.php:

'cv' => 'Чӑваш - (Ĉăvaŝ)', # Chuvash

But Chuvash language uses only Cyrillic script. Moreover, Ĉ letter exists only
in Esperanto alfabet.

So, Should be:
'cv' => 'Чӑваш', # Chuvash

Version: unspecified
Severity: normal
URL: http://en.wikipedia.org/wiki/Chuvash_language