You can say le-le or liyo.https://www.livinglanguage.com/community/discussion/315/saying-youre-welcome-in-japanese-not-recommended
"Irasshaimase." "Youkoso."
You may say 'youkoso.'
シチュー You're welcome.
When a customer enters, you may say 'irasshaimase.'
'Guamu e youkoso.'
kyoukai e yokoso
'Welcome to school' would be学校へようこそ (gakkou e youkoso) in Japanese.
watashi no heya e youkoso
みなさん、ようこそ (minasan youkoso) is the Japanese equivalent of 'welcome everyone'.
Sore ga shinjitsu nara
よこそう yokoso means welcome in general