Ruin Explorer
Legend
Ironically this is kind of much closer to some early 2E stuff than stuff in-between. Taladas, back in 1989, decoupled race and culture to a significant extent. Not completely, but it had a lot of cultural kits, many of which explicitly could be taken by a number of different races, and which established your language(s), weapon proficiencies, starting proficiencies, and so on. For example the main group of steppe riders could be elves, half-elves or humans (as I recall). Whilst I don't think it was specified, it would also have been very easy to simply extend this and say "this dwarf was raised with the steppe riders, so has the same kit as them, instead of this other kit".