What is the ruling on mixing in schools and workplaces in non-Muslim countries if it is necessary for one's livelihood, and what is the ruling on women learning foreign languages in these countries to manage their essential affairs?

If the husband is proficient in the language of the country, it is not permissible to go to mixed schools except in cases of extreme necessity, while adhering to the hijab (definition), refraining from using perfume, and avoiding mixing as much as possible. If there is no necessity, it is not permissible to study or work there due to the corruption and great temptation present in those places.