There's a new simpleTAL release available. simply rename ebuild to get it working. I've also attached a nice patch for i18n support made by Igor Stroh. it may be a useful 3.12-r1 release that's masked. This way it is available for interested developers. Reproducible: Always Steps to Reproduce:
Created attachment 53761 [details, diff] patch for i18n support
Added 3.13 to portage. The i18n patch should be applied upstream.