The issue of using all caps in titles has been discussed extensively. It is acceptable to use capital letters in titles, as long as it is not excessive. A title such as “This needs to STOP now” is perfectly fine.
Forums using a CJK locale can also type titles in their native alphabet just fine, as we automatically disable ALLCAPS detection on it.
But, if a user types in ALL CAPS CJKCHARS ALLCAPS MORECJK, it triggers an all caps detection because all lower caseable characters are in caps. This causes issues for forums that use a mix of English and CJK, but with English as the default language. In this case, they need to toggle a single site setting.
Alternatively, punishing every non-other forum with ALLCAPS is not an ideal solution.