Joining MKV with subs in multiple languages with MKVToolnix

(very sorry for my very bad english)

I have: 1.MKV, 2.MKV,...,~400.MKV
All MKV: 1 Video, 1 Audio, 0-3 Subs.
The typ (resolution, framerate and so on) of video-, audio- and sub-streams are absolut intentical in all MKVs.

I append the MKVs with MKVToolnix.
The video and audio was very good, no errors.

But with the subs there are this problems. Example:
25.MKV:
ID=2, pgs-subs, german forced
ID=3, pgs-subs, german full
ID=4, pgs-subs, english full
39.MKV:
ID=2, pgs-subs, english full
42.MKV:
ID=2, pgs-subs, german full
ID=3, pgs-subs, english full

The subs in the result of MKVToolnix are err, because the subs-IDs are not identical in all MKVs.

I want, that MKVToolnix sort the subs with her language and not with her ID.
To move in MKVToolnix the subs manually is too much work for me :)

Can anyone help me please?