Language problem after ajax call (Stream)

Hi Team,

I found when I try to switch "filter" in the stream page (viewing via zh-TW), string will switch back to en-GB. This ONLY happens with Google Chrome (desktop / Mac); and clearing cookies will fix the problem ... for a while, normally few days, and it happens again.

Not sure if any of you spot this issue with Goggle Chrome between EasySocial?

p.s. two picture is captured under zh-TW, but after the ajax call, it turned into en-GB only inside the stream updates.