'Riichard' is an English word, not a Lakota word, so there is no way to say Richard in Lakota.
To say "hello my friend" in Lakota, you would say "háu mitákuyepi."
what is my Lakota name;decedant of Lakota Sioux and proud of my heritage.
To say "aliyah" in Lakota, use the words "Pte Yuha Win".
You say maLakota welo [I am Lakota, it's a fact].
To say "welcome friend" in Lakota, you would say "Wóphila, kštó" which translates to "Welcome, friend."
In Oglala Lakota, "thank you" is pronounced as "wopila."
The word for Teacher in Lakota is: Wah Ushpeeweechakeeyapee.
In Lakota the verb meaning "to approve" is hechetula or yasuta.
The Lakota word for thunder is wakina. The Thunderbird spirit is wakinyan
Tatonka
In Lakota, you can say "wóphila tȟáŋka" to a female to mean "you're welcome."