Legacy Architects doesn't have any option available to change languages on itself. But if you or your client are using an updated Google Chrome browser, you can change the language that the Legacy Architects uses.
To change the language of Legacy Architects, click the triple vertical dots in top right corner of the Google Chrome window. (Right below the close (x) button.)
Select the Translate option:
Click the triple vertical dot button on the mini pop-up window that will appear:
Select the "Choose another language" option:
Click the drop-down box for the language options and select your desired language.
Note that this translation uses Google's translation and it is imperfect but usable. This will improve as time passes by.