Tmux doesn't render some symbols properly

Question

I'm using powerline-go to generate the bash prompt. It works fine in the tilda (also Konsole), like so:

Which is fine. However, the moment I open tmux it becomes messed up:

Basically, the segment seperators end up shown as underscores. This is pretty annoying, and I'm not able to understand why tmux refuses to render my fonts the same way as a regular terminal.

I'm using Fantasque Sans Mono, but I see the same behaviour with other fonts.

In fact, it seems tmux doesn't render any utf-8 symbols properly. I tried

echo -e '\xe2\x82\xac' 

this prints the euro sign in the normal terminal, but again an underscore in tmux.

Answer 1

Solved it by adding the following to my .bashrc

export LC_ALL=en_IN.UTF-8
export LANG=en_IN.UTF-8