My English is not good, it may point not clearly.
update_po_from_wiki.sh should be no problem.
For the Chinese, in zh_CN.po, i use \n split sentence, such as tips.ufo's sentence.
if the tip is too long no whitespace, will not show in game.
In the ufopedia ,if too long, lower fps.
I see the Thai translation, use a whitespace split sentence.
perhaps in the wiki, an Note that is a solution to the problem.
Perhaps the sentence should be separated by a whitespace
By the way, Chinese comma and dot ,not ',' and '.' , is ',' and '。'