The following languages in layouttranslation file are used, yet they haven't
been reviewed by native speaker and we should ask for checking the list any
time (new) translator appears with .po update.

(29.4.2011, LyX 2.0.0 release) 

ar
bg
ca
el
fi
gl
ko
nb
ru (Acknowledgement string issue only)
sl
tr
zh_TW