The basic text stemming is just not capable of that with out exact definitions for each permitation.
MetaAI just released their Llama model which is much smaller than ChatGpt and does run on a Pi even if extremely slowly 10sec/token.
Also Stanford took the model and refined it to produce Alpaca in an extremely cost effective manner.
https://crfm.stanford.edu/2023/03/13/alpaca.html
GitHub - ggerganov/llama.cpp: Port of Facebook's LLaMA model in C/C++ aka whisper.cpp but llama