Is this correct?

[Rudy Beoulve]

Konnichi wa, watashi wa Ruji desu.

"Hello, I'm Rudi"

And I want to say "I'm from Portugal".

So.

Watashi wa Portugal kimashita.

Is it like that? (I doubt it xD)

Also, if I wanted to tell that in the same sentence:
Konnichi wa, watashi wa Ruji desu, watashi wa Portugal kimashita.
What can I replace the underlined expression for, in case I don't want to repeat myself?

[stephy_sby]

not really good in japanese. just from what i managed to get from chatting.

konnichi wa, watashi wa Ruji desu. Portugal kara kimashita.

or perhaps

konnichi wa, watashi wa Portugal no Ruji desu.

not guaranteed 100% but this is what i manage to get out from chatting. hope it helps.

[richvh]

Rudy Beoulve wrote:
Konnichi wa, watashi wa Ruji desu.

"Hello, I'm Rudi"

And I want to say "I'm from Portugal".

So.

Watashi wa Portugal kimashita.

Is it like that? (I doubt it xD)

Close. "Watashi wa Porutogaru kara kimashita" (I am from Portugal) or "Watashi wa Porutogarujin desu" (I am Portuguese)

Also, if I wanted to tell that in the same sentence:
Konnichi wa, watashi wa Ruji desu, watashi wa Portugal kimashita.
What can I replace the underlined expression for, in case I don't want to repeat myself?

You leave it out (which you can do even if you leave it as two sentences), and in compound sentences like that, the desu becomes de.

Konnichi wa, watashi wa Ruji de, Porutogaru kara kimashita.

[Oyaji]

My entry:
ポルトガルから来ましたルーでィです。Porutogaru kara kimashita Rudy desu.
Or:
ルーディと垂ｵます。ポルトガルから来ました。Rudy to moshimasu. Porutogaru kara kimashita.