...can you give a example, who need change "keyboard" language just for that ?
Because I assume it is very small percent people of doing that.
After all, you need keep in mind, SourceMod register console commands so it can also check admin access.
So, you should think admin system in SourceMod, are you bypassing that ?
Also try think this way...
if you share your plugin to others,
do you think they want extra command inputs what they do not know or understand nor have keyboard symbols for those in different language ?
There can be also problem with character symbols, SRCDS not regognize them all or you get else bugs in formatting strings.
If you want others to "translate" command input to else, let them do it, using another plugin.
Like this one, I'm not sure this is good one.
[ANY] Command Aliases (V1.3, 2019-05-14)