Fuku tamina is happy wedding in Tamil, hope this helps you :).
You can say "இனிப்புறம் வாழ்த்துக்கள்" (Iniya pirandha naal vaazhthukkal) in Tamil, which translates to "Happy wedding".
In Tamil, you would say "இனிய ஆசிரியர் தின நல்வாழ்த்துக்கள்" (Iniya aciriyar dinna nalvazhthukkal) to wish someone a happy Teacher's Day.
Kalyanam
In Tamil, "Happy Wedding Anniversary" is said as "திருமண ஆண்டு விழாக்கு வாழ்த்துகள்" (Thirumaṇa āṇṭu viḻākkum vāḻttukaḷ). You can also simply say "சந்தோஷமான திருமண ஆண்டு விழா" (Santoṣamāṉa thirumaṇa āṇṭu viḻā). This conveys heartfelt wishes for a joyful celebration of the anniversary.
You can say "Pongal Vazhthukkal" in Tamil to wish someone a happy Pongal.
diwrnod priodas hapus
You can say "நான் மகிழ்ச்சியில் உள்ளேன்" in Tamil, which translates to "I am happy."
"Eniya deepavali nalvaalthukkal" is happy Diwali in Tamil.
Santhosamaaga Iru
Intha Naal meendum meendum Ungalathu vaalkkaiyil Uthikka enathu Nal Vaazththukkal.
Navaraathiri Nalvaazhthukkal
To say "happy journey" in Malayalam, you can say "സുഖമായ പ്രയാണം" (sukhamaya prayanam).