is this correct (japanese)?

Question

I love cats = watashi wa suki neko (how would you make cat plural?)

also, how would you say: my birthday is/was March 6th ?

Answer 1

No, that's a terrible translation.
First off, Japanese is not English. English is written in the S-V-O order (subject followed by the verb followed by the object). Japanese is not. Japanese is generally in the S-O-V order. So whereas we would say I (subject) ate (verb) a chicken sandwich (object), Japanese would say I a chicken sandwich ate.
Second, Japanese is not English. Not all verbs in English are verbs in Japanese. Sometimes nouns are verbs and verbs are adjectives, etc. etc. Take "like", a verb in English. It's an adjective in Japanese. Like becomes 好き (suki) in Japanese, which is an adjective. So you can put it before a noun, as in 好きな車 (suki na kurumi), which means "car that I like."
Third, Japanese is not English. You asked how to make cat plural? You don't. "plural" and "singular" are concepts of western languages. I have students who have been studying English for years, and they STILL forget to say "A" sandwich or sandwich"es". Japanese doesn't have any singular or plural forms.
Anyway, the correct expression would be "watashi wa neko ga suki desu." And there are a million varieties on how to say that, depending on whether you are male or female, or if you want to speak casually or formally. Here are some examples:
ore wa neko suki.
boku wa neko ga suki de gozaimasu.
atashi wa neko suki da yo.
kochi wa neko suki ya de.
atashi wa neko suki da pyon.

I recommend actually studying the language, rather than just using a dictionary. ganbatte.

Answer 2

No. Japanese does *not* follow the same format as English. It should be "watashi wa neko ga suki desu". Yes, that "ga" there is important.
In Japanese neko can mean a cat, the cat, or cats. If you want to be picky you can say specific amounts but most Japanese do not pluralize words with "tachi" as we pluralize words with "s".

My birthday is March 6th = "Watashi no tanjyoubi wa san gatsu muika desu."

Answer 3

"neko ga daisuki?" I'm not really sure. and there is usually no difference between singular and plural in japanese.

Tanjoobi wa sangatsu muika desu. = My birthday is on March 6th.

Answer 4

watashi ha neko ga suki!

Answer 5

-tachi usually denotes plural living things
so i think its
watashi wa nekotachi ga daisuki desu.
i think!

Answer 6

私は猫を愛しています

This is the correct translation