Common Lisp for the 1130:
http://ibm1130.org/sw/lisp
Could 1130/emacs be on the horizon?
And, according to the web-site, you already have Fortran, APL and RPG (maybe others).
See the goodies list at:
http://ibm1130.org/sw
Note: The comment on that page about Cobol is incorrect.
Cobol/360 is public domain, part of our MVS-3.8j set of disk packs, and we may also have the source to it on those desk packs.
If we have that source, it might be possible (on the K5/390) to cross-compile it for the 1130.
{ Hmm... cross-compile it (on the K5/390) to run native on the Kindle ARMv7l ?? Duh... }
Note 2: There is another 45 years worth of mainframe software out there, if anyone has enough 'google credits' to search for it.