Shingeki no Kyojin - Vol. 10 Ch. 41 - Historia

[MangaDex]

 

[SSS26032002]

So that explains her being able to read that can's writings..... but wait still.. how?? that was ancient writing....
Still hope can be seen now... and Eren got a kill like nothing happened..... *sigh* he needs to calm down...

 

[simp_one]

eren first kill

 

[TR16208]

Spoiler

i think that can was from Marley, and Ymir was from Marley, so she could read the language