Learn what you don't know.

How do I say ?

No premade courses. You learn the phrase you needed — in the moment you needed it.

How it works

Capture. Study. Listen.

Translate and save the phrase that stopped you, review before you forget, then hear your own cards.

English

Good morning

Spanish

Buenos días

Most apps start with
someone else's list.

Lacuna starts with
the blank.

I couldn’t find a one-stop shop for filling the gaps in my language knowledge— so I built one.

Joseph DiSpirito, founder · the story

Start with the next gap.

84+ languagesand no, you don’t have to pay for Pro to get fluent in one of them.