Predictive text problem with French word "très"

I'm not sure this should be reported as a bug as it's a very specific problem with one word in French.

I want to enter the French word "très" (in English, "very" - so, an extremely common word)

Expected behaviour: tap T-R-E-S, the first suggestion should be "très"

Actual behaviour: the first suggestion is "tressaillant", an almost unused word. Très (with accent) isn't suggested at all.