Wait, let me reconsider. "ราตรีสวาท" appears to be Thai text. However, this doesn't appear to be standard Thai language - it may be a misspelling or non-standard text.
If you meant "ราตรีสวัสดิ์" (Good night in Thai), the Japanese translation would be:
おやすみなさい
Please clarify if you need a different translation or if the original text was different.
おはよう
Wait, let me reconsider. "ราตรีสวาท" appears to be Thai text. However, this doesn't appear to be standard Thai language - it may be a misspelling or non-standard text.
If you meant "ราตรีสวัสดิ์" (Good night in Thai), the Japanese translation would be:
おやすみなさい
Please clarify if you need a different translation or if the original text was different.