Transifex sync

htdocs/langs/ar_SA/admin.lang

htdocs/langs/ar_SA/contracts.lang

htdocs/langs/ar_SA/exports.lang

htdocs/langs/ar_SA/holiday.lang

htdocs/langs/ar_SA/mails.lang

htdocs/langs/ar_SA/main.lang

htdocs/langs/ar_SA/products.lang

htdocs/langs/ar_SA/stocks.lang

htdocs/langs/bg_BG/admin.lang

htdocs/langs/bg_BG/contracts.lang

htdocs/langs/bg_BG/exports.lang

htdocs/langs/bg_BG/holiday.lang

htdocs/langs/bg_BG/mails.lang

htdocs/langs/bg_BG/main.lang

htdocs/langs/bg_BG/products.lang

htdocs/langs/bg_BG/stocks.lang

htdocs/langs/bs_BA/admin.lang

htdocs/langs/bs_BA/contracts.lang

htdocs/langs/bs_BA/exports.lang

htdocs/langs/bs_BA/holiday.lang