As an action, you can create a vial of liquid that sounds like a polyglot of languages when the cork is removed. A creature can drink the contents as an action to understand the literal meaning of any spoken language that it hears. The creature also understand any written language that it sees, but it must be touching the surface on which the words are written. It takes about 1 minute to read one page of text.
This effect doesn’t decode secret messages in a text or a glyph, such as an arcane sigil, that isn’t part of a written language.
Tongues Potion. You can expend 1 additional catalysts so the creature also understands the true meaning of any spoken language it hears. Moreover, when the target speaks, any creature that knows at least one language and can hear the target understands what it says.