Renaming forced subtitle track

I am trying to add normal English subs and forced English subs to an MKV. On all my other MKVs these appear Track 1 – English, Track 2 – Forced and so I’d like them to appear the same.

As the forced subs are in English, when I export the MKV and read them into VLC, I instead get Track 1 – English, Track 2 – English. So I take it the second field is reading from the language, which doesn’t look like it accepts custom inputs that are not on it’s list.

How I can edit my forced subs to read Track 2 – Forced? Any help appriciated