I am by know means an expert on the Lakota language, but after a little bit of research I believe I have an acceptable answer...
The verbs "wasté" and "ȟópeča" both mean "to be beautiful", so by adding the stative pronoun for second person, "ni-", we can generate the phrase "you are beautiful":
Niwasté (you are beautiful, more of a general term, can also mean "good" or "nice") - pronounced "nayeewahstAY"
Niȟópeča (you are strikingly beautiful, more "specific") - pronounced "nayeeH*Opaycha"
*the H (ȟ) is pronounced with a rasping of the throat, almost "hkhk", really fast. It's rather difficult to convey, but a simple "H as in house" sound will probably suffice...
'Riichard' is an English word, not a Lakota word, so there is no way to say Richard in Lakota.
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].
Lotancila
I love you in Lakota.... Lela Washtae Che La Ke
To say "welcome friend" in Lakota, you would say "Wóphila, kštó" which translates to "Welcome, friend."
Well, honey, to say "hello my friend" in Lakota, you would say "hau, kola" which translates to "hello, friend." Keep in mind, I ain't no expert, but that's the gist of it. So go on, impress your friend with your newfound Lakota skills!
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.
Tatonka