douitashimashite
If you need it in true Japanese context: どう致しまして。
You can say le-le or liyo.https://www.livinglanguage.com/community/discussion/315/saying-youre-welcome-in-japanese-not-recommended
You just said it yourself. If you want to say it in another language, you need to say which one.
"Irasshaimase." "Youkoso."
"Sorry" in English is translated to "Sumimasen" in Japanese."You're Welcome" in English is translated to "Doo itashimashite" in Japanese.To say someone's name, you say "-san" For example,"Clark-san" in Japanese is "Mr. Clark" in English. "-San" means "Mr. or Mrs." and it is polite to place "-San" after their last name when greeting them.
You may say 'youkoso.'
You say "shukran" which means "thank you".
シチュー You're welcome.
When a customer enters, you may say 'irasshaimase.'
'Guamu e youkoso.'
kyoukai e yokoso
당신은 환영합니다 = You are welcome
'Welcome to school' would be学校へようこそ (gakkou e youkoso) in Japanese.