Add FAQ how to change currency and numeric values formatting

docs/content/faq.md

@@ -272,6 +272,15 @@ draft: false
 
   The selected currency conversion is autosaved. You can also press <kbd>ctrl</kbd>+<kbd>s</kbd> to manually save the selected currency conversion.
 
+## How do change the format for currency and numeric values?
+
+  cointop uses the `LC_MONETARY` and `LC_NUMERIC` environment variables to format
+  currency and numeric values. To see cointop display currency with Bengalese numbers
+  and numeric values in arabic run `/usr/bin/env LC_MONETARY=bn LC_NUMERIC=ar cointop`.
+  For more information about how to check and configure your locale settings see
+  [`locale(1)`](https://www.unix.com/man-page/linux/1/locale/) and
+  [`locale(5)`](https://www.unix.com/man-page/linux/5/locale/).
+
 ## What does saving do?
 
   The save command (<kbd>ctrl</kbd>+<kbd>s</kbd>) saves your selected currency, selected favorite coins, and portfolio coins to the cointop config file.