Currencies in the Budget

1. If I change base currency, budget planned amount are not changing. For example, I budgeted 100 roubles, then change base currency to Euro and now I have 100 EUR in budget (but should be around 1.20)

2. Some times I have spendings in different currency. Mostly I use rubles, but if I go to Europe, I spend EUR (for example, for the hotel, food etc). I make budget using rubles as base currency and use current exchange rate. And I plan to use 100 EUR for the hotel. Yesterday it was 8000 rubles and I put this figure to the budget. But today it is 8300 and I have red sign, that my expenses exceed budget.
Is it possible to add currency field to the budget and plan expenses in different currencies?

[Nikolay]

Thank you, Olga, for your comments.
Both point to draw a full-fledged Feature Request.
Unfortunately, this is not simply to implement.

Спасибо, Ольга, за ваши замечания.
Оба пункта тянут на полновесный Feature Request.
К сожалению, реализовать такое не просто.

Понятно, спасибо. 
Пока разделила на две базы данных: рублевая и евровая, буду пользоваться двумя разными файлами для разных трат и счетов. Потому как видеть рублевый эквивалент евровых затрат мои нервы не выдерживают

Thanks. Will try to use two different databases for EUR and RUB expenses