My surgery was Apr 10/18, and I had a big hump down my tongue on the side of the partial glossectomy (~ 25% of my tongue). It had improved somewhat but at the end of November my doctors were telling me that might be as good as it would get, perhaps just marginally better. Then I noticed about a month ago that it’s improved dramatically, my tongue looks almost normal! So that would be 10 mos post surgery for me, although I know everyone is different. And I still have significant numbness issues on my neck, and some things I can eat pretty good but very much some ongoing eating challenges too. Again, everybody is different, this I have learned.

I hope all goes well for you.

Mouth/tongue cancer dx Feb 2018.
Surgery Apr 2018, partial glossectomy, tongue reconstruction (radial forearm flap donor site), neck dissection.
Tumour 2.5 cm, 0.8 cm deep.
Histologic grade G3 Poorly differentiated.
3 of 25 lymph nodes involved max size 0.6 cm.
pT2pN2b (stage 4a)
Chemo Radiation June / July 2018. Completed 35 rads, 2 of the 3 chemos.