[BUG] Several different Chinese language tags

[ibin7777]

Describe the bug
As it seems to indicate, language:zh, cn, zh-CN, all of these 3 tags refers to simplified Chinese?
Not sure if there's more,
It's not really much of an issue, but combining them would be much better.

Expected behavior
just zh-CN / zh-CHS for Simplified Chinese and zh-TW / zh-CHT for Traditional Chinese.

[prostagma-fp]

Those were the product of curator contributions and not specifically the launcher. Currently, all Chinese languages on curations are set to "zn; please hit the Update button at the home tab if you see an outlier.
When language fields become "tagified" as of #287 this won't be a possible issue anymore.