[smeenai]

> In kirundi (a common language in Burundi) there is one word for both yesterday and tomorrow.

This is true in Urdu and Hindi as well.

[saagarjha]

Yep. Not sure about Kirundi, but in Hindi it's not really an issue since the tense of the sentence gives it away.

[dingo_bat]

Not always. I've to use "aane wala" and "bita hua" quite often.

[k__]

So it's like saying

I will be at home tomorrow.

I was at home tomorrow?

Sounds rather efficient :D

[saagarjha]

Essentially. When there is confusion, extra words are added to clarify as dingo_bat mentions above.