Salary in employer's letter - which currency to specify?

[Carmageddon]

Is it ok to use the local currency?
If not, which exchange rate should I mention?

 

[Cartermartin]

It's better to mention the local one. You can add ($approximately) for the better understanding. Every country have a specific visa section where employees knows allot about the country they are dealing with.

 

[mabmabs]

Is it ok to use the local currency?
If not, which exchange rate should I mention?

Use the original one (local currency). It is only a proof of your employment, not to evaluate your salary/income.