In indonesia you say : Aku cinta kamu
Aku (I)
Cinta (love)
You (kamu)

in mandarin you could also say : 我喜欢你
我 : I
喜欢 ： like
你 ： you

in japanes (maybe) : watashi wa anata suki des (correct me if i am wrong)

Hey, nice idea. My mother tongue is Telugu (One of the widely spoken languages in India).

In our language, we say "Nenu Ninnu Premisthunnanu"

Nenu means I.
Ninnu means You.
Premisthunnanu means doing Love (Its a verb, and its present tense).

Ninnu Nenu Premisthunnanu is same as Nenu Ninnu Premisthunnanu.
No difference in meaning.

Hi,

Let me put it this way that the language you choose does not matter at all.

Bahaii ( a Persian writer) once wrote 500 years ago:

One who does not say a word and applies his will is a real man.
One who first speaks about it and then applies his will is a semi-man.

Well! Let's prove to those we love, that we love them not by words but by the deeds we do. By our look. By the way we greet them. By the way we kiss them. By the way we share our joy and depression with them. After that I can simply say to my fiance "dooset daram"

We in Macedonia say: Те сакам or

Те - I
сакам - love you