There's a race from Yunotha who communicate via photosynthetic glowing patches of skin. Humanity developed a hand-held translation screen, no issues.
The Gronithans, the species that built their society on being olfactory? A human is their most popular composer, not to mention their most beloved comedian is also human.
Again and again, as humanity explored the galaxy, they worked out how to communicate and get along with every race they met.
The Emigort look almost identical to humans, their languages have similar rules... Is being similar the problem?
Or maybe it's all the minerals their home planet contains...