It depends how you personally feel about it. If the echo had any plot value to you and in, any way or shape formed your character because it is 'the echo', as simply opposed to a tool to give him all languages, you can either keep it, seeing as there might not be any harm in it (and potential use for the echo in plot-lines etc). I heavily doubt however anyone would take offense to having the echo in this minor offset only for lingusitic purposes.
Ofcourse, if you still harbor doubts or feel itchy about it, you can simply go with Titor being some kind of savant, confusing it with the echo. There are people out there who where able to learn languages within hours thanks to an enormous memorizing capacity. Though I think the Savant syndrome usually just kicks in in math fields and the likes, less in languages.
Ofcourse, if you still harbor doubts or feel itchy about it, you can simply go with Titor being some kind of savant, confusing it with the echo. There are people out there who where able to learn languages within hours thanks to an enormous memorizing capacity. Though I think the Savant syndrome usually just kicks in in math fields and the likes, less in languages.