How do you say it in your native language?

Canadian:

Good Morning - Morning eh
Good Evening - Evening eh
Bon Appetite - Enjoy your meal eh
How are you? - How's it going eh?
What's the time? - You wouldn't happen to have the time on you eh?
Why did czech president Vaclav Klaus steal the pen? - You wouldn't happen to know what Klaus did with that pen eh?

Keep in mind that I don't usually speak like this, but...

South Central Los Angeles

Good morning - Yo, whassup, ya know what I'm sayin'?
Good evening - Whassup, dawg?
Bon Appetite - Ya'll best be grubbin' a'fore that shit done get cold.
How are you? - Dayyum, homie, what it be?
What's the time? - Yo, joo check da timez, dawg?
Why did czech president Vaclav Klaus steal the pen? - What da fuck?! Dat crazy muthafucka Klaus-his-face done jacked dat pen like a crack-head at Radio Shack!

(NOTE: when speaking to a female, substitute "bitch" for "dawg," and "gurl" for "homie.")

My language is yousuck

Good morning - yourgay

Good evening - yousuck

Bon Appetite - lolugay

OP did my work for me.

Portuguese here (from Portugal, not Brasil):

Good morning - Bom dia
Good evening - Boa tarde
Bon Appetite - Bom apetite
How are you? - Como está?
What's the time? - Que horas são?
Why did czech president Vaclav Klaus steal the pen? - Porque é que o presidente Vaclav Klaus roubou a caneta?

Irish!

Good Morning - Maidin mhaith

Good evening - Tráthnóna maith

Bon appetit - Go raibh an bia blasta

How are you? - Conas atá tú?

What time is it? - Cén t-am é?

Why did czech president Vaclav Klaus steal the pen? - Cén fáth go raibh an t-uachtarán Czech Vaclav Klaus ghoid an peann?

welsh

Bore da -
Noswaith dda -
Bon Blas -
Sut wyt ti? -
Beth yw'r amser? -

Pam oedd llywydd Vaclav Klaus czech dwyn ​​y pen? ei fod yn cachu

polish

Good morning - Dzień Dobry

Good evening - Dobry wieczór

Bon Appetite - Smacznego

How are you? - Jak się masz?

What's the time? - Która jest godzina?

Why did czech president Vaclav Klaus steal the pen? - Dlaczego prezydent czech, Vaclav Klaus, ukradł długopis?

Vaclav YOU BASTARD! :)

Hodor

Good morning - Hodor
Good evening - Hodor!
Bon Appetite - Hodor hodor
How are you? - Hodor?
What's the time? - Hodor hodor?
Why did czech president Vaclav Klaus steal the pen? - Hodor hodor hodor?

Good morning - Buongiorno
Good evening - Buona sera
Bon Appetite - Buon appetito
How are you? - Come stai?
What's the time? - Che ore sono?
Why did czech president Vaclav Klaus steal the pen? - Perchè il presidente ceco Vaclac Klaus ha rubato la penna?

Good morning

Good evening

Bon Appetite

How are you?

What's the time?

Why did czech president Vaclav Klaus steal the pen?

-rock paintings

I've two native languages, but since spanish is already posted, I'm post only the second:

basque
Good morning - Egunon
Good evening - Arrastion
Bon Appetite - On egin
How are you? - Zer moduz?
What's the time? - Ze ordu da?
Why did czech president Vaclav Klaus steal the pen? - Zergaitit lapurtu du argatza txekiar lehendakariak Vaclav Klaus?

Lithuanian : :)
Good morning - Labas rytas
Good evening - Labas vakaras
Bon Appetite - Skanaus or gero apetito
How are you? - kaip laikaisi ?
What's the time? - kiek dabar laiko or kiek dabar valandų ?
Why did czech president Vaclav Klaus steal the pen? - Kodėl Č[ch]ekijos prezidentas vaclavas Klausas pavogė pieš[sh]tuką ?

I love nuts - אני אוהב אגוזים

My cat ate my wolf spider - החתול שלי אכל את הזאב-עכביש שלי

Magic friends singing dora - החברים הקסומים שרים דורה

Although I am largely an English speaker (and writer), I still do know Burmese (language of Myanmar).

Good morning - Mingla ma-net khin bar

Good evening - Mingla nya-nay khin bar

Bon Appetite - Kaung kaung sa par (there isn't an exact phrase of bon appetite in Burmese; this is the closest phrase I could come up with in terms of meaning)

How are you? - Nay kaung la?

What's the time? - Ba a-chane lae?

Why did czech president Vaclav Klaus steal the pen? - Czech ta-ma-da Vaclav Klaus ba phyit lo pen ko kho ta le?

I may not be exactly right about the spelling (I don't really know how to type the actual language on computer so I just typed the pronunciation), but it should be mostly correct.
Nice to see there are people from all over the world on SG :)

Arabic - عربي
Good morning - صباح الخير

Good evening - مساء الخير

Bon Appetite - بالهناء والشفاء

How are you? - كيف حالك؟

Whats's the time? - كم الساعة الأن؟

Why did czech president Vaclav Klaus steal the pen? - لماذا قام الرئيس التشيكي بسرقة القلم؟

But how most arabs chat online:

Good morning - Saba7u 5ayee: Sabahu khayee

Good evening - Masa el 5er ya air: Masa el kheir ya air

Bon Appetite - Sa7teeeeen 3a alboooo: Sahten Aa elbow

How are you? - shu 5aye rawa2?: shoe khaayi rawaak?

Why did czech president Vaclav Klaus steal the pen? - Eben el sharmuta 5abat el 2alam!: Ibn el sharmuta khabat el kalam!

Indonesian
Good morning - Selamat pagi
Good evening - Selamat malam
Bon Appetite - Selamat makan
How are you? - Apa kabar? / Bagaimana kabarmu?
What's the time? / What time is it? - Jam berapa (sekarang)?
Why did czech president Vaclav Klaus steal the pen? - Mengapa presiden Ceko Vaclav Klaus mencuri pulpen?

Good morning - Дͦͩ̀̎̀͊̋̆ͤ͒̒̇̉̂̓̃ͮͩ́́͝͝о̷͌̏ͭ̀б̨͂ͧ͋ͬͫͤ̎́̀ͥ̿ͭ̐̔͘͠͞р̈́̋̅͐̌̂͌̓҉̷́̀͜о̴̷́̃͑ͫͪ͆̽̾̍ͨ͌͑̕͢е̛̓͌̔̃ͩ͑ͭ̒̀͟͞ ͋͂͐ͬͤ͛͂̀ͨ̉̚͢͏̸͝у̍̇ͪ̄̒ͨͯͨͤ̒ͦ̾̿̄̉͌͂̾̈́͝т̴̷̋̒̉͛̉͊͠͡р̶͛̾̾̽ͤ͂ͣ̌͋͑͛͂̀о̨̑̽͊͗͂̉̉̽̒̌́̂͊ͦ̑͘͢͡

Good evening - Д̕̕о̡͜б̸̨̧р̸̶̡͘͟ы̸͘й̸̧ ̶́͘͟в̡͢͜҉е̶̷̧ч́̀̕͏́ѐ̷̧͞͠р́

Bon Appetite - П̨͘͢͡͡р̸͢и͝͞я̡͝͏̴т̵̡͢н̵̛͏͜͠о͜ѓ̸̛́о̵̶̴͠ ̕͢а҉̴͜҉п҉͏͟п̡̡͘е҉҉̨т́̕͞͠и̶т͏͘͠а̵̡́͞

How are you? - К̷҉̢͟а̡̕͟к̵͘͟ ̵̧́д̸̧͝͞е̸̸͝͝л̴̨͡а̶̛͜?̸

What's the time? - К̴̡̕͘͝о̸̴͘т̷͞͞͡о̡р̡̡͟͜͜ы̷̸̢̕͏й̶͝͠͠ ͠͏͞ч̸̛͘͟͡а̶̨́͡с͟͡͠?̷͝

Why did czech president Vaclav Klaus steal the pen? - Н̷̸̘̘͉̣̫͉͕̣͍̤͜͠а̛͘͜҉̸̜̣̙̤̬̫̺̱̺͓х̨̡̬͕̠͓̦͠у̵̧̯͓̩͖̠͉͚͎͙̣̠͚͙̯̹͝ͅͅя̢̰̱̳̫͉̟̞̻͝ ̨̟̯̪̗͔͍̱̜̟͉͚̫̩̝̲̙̦͟п̧̱̠͕͚̳̺̟̹͞ͅͅр̴͕̲͎̮̝̱̱͉̹͈̠̳̪̻̹̖͠е͖̭̹͔́ͅз̨͈̜̞̦̗͖̙̭̣͔̣̦̞̙͘͡͞ͅи̴̢̡̯͖͇̳͖̺͉͠д̛̩̭̝̗̞̪̮͎̙̲̘̳̟͉̝̝̭́е̴̵̜̫̫̻͜͞ͅн̢̳̦̺͍̼͓̼̞̱̗͘͞ͅͅт͏̡͏̸̠͉̗͎̦̠̹̥͚̱͖̙͡ ̢̫̼̰̺̥͇͉̘̀͢͠Ч҉̷̡͖̜̹̩̙̫̺͖̜е̴̴̡̢̥̗̫̤̯̝̤̬͓̪͙͖̳̖̻̱̣х̷̵̶͎̞͠ͅи̡̦̜̲͖̯̤͙̯̘̤̖̪̤̱͡ѝ̺̜͕̼̝͇͕̙͉̘̲͍̪͟ͅ ͠҉̺̖̟̙̥̣̙̟̤͘͡В̷͟͏̣͈͎̻͙͖̲͉̦̫̙̲͈̲͖̮̪͓и̵̵̴̡̻̟̟̪͔̯̭͚̳̞͝ц̸̴͎̼̦̩͎͟͟͝л̸҉҉͏͉̳̦̞̳а̛͏̴͖̘͕͍̦̭̣̞̝̭͖̤̣̼͇̯̦̥̞в̛͘͠͏̫̰͕̯̪̘̖̖̤̺̞̝̙͕̭̞̤ ̴̢̢̗̞̩͉̻͖̖̤͎̟͕̣̬̱̠̗͍ͅͅК̸̩̦̖͍̲͔͖̖͉̠̼͠л̸̬̝̙͉̥̞̖͕̙̤̞̜͉̯̬͔̪̟͘͞а̸̧̳͎̝̖̳̼̰̟̘̫у̴̨̠͖̱̥с̵҉̢͙̣̣̺̭̺̳̬̞̩́ ̵̖̭͍̹͈̗̹̰͇̤̭̗̱̝̩͠͝с̢̹̞̤̗́͡͞п̢͏̜̰̬̳и̢̢̛͔̫̪̳͈̪͙̬̪̣̳̫̠̠̠̦̝ͅз̵҉҉̰̯̪̹̞͍̰͖̲̞͖̼̘д̵͕̘͙̙̪̩̗̼̱̥̣̲̫̯̀͢͞͞ͅи̸̣̤̟̥̮̦̘̰̟̮̠̱͜͡л̢̯̱̜̬̦̠̥̘̣͉̫̖͙̯̻̭͕̀ͅͅ ̶̧̛̻̣̮͚̲̯̝̙̫̀͡ͅр̷̴͏̲̘̩̟͙̥̮̬͍̬̜̝ͅу҉̺͎̼̲̫͇̺̱͓̺̮̺̤̳ͅч̶̡͖̫̯̜̮̼̤͈͇̙к̳̯̫̝̀́͜͝у̶̶̧̼̱͍̬̜̬͕̣̲̙̣?̴͇͖̫̞͚̬̬̱̯̜͖̗͈̥͍̫̩̖̰̕

Our communication consists of downing a bottle of Estonian spring water and yelling "Perkele!" from the bottom of our lungs.

Edit: Oh yeah, I speak Swedish too: Børk börk bôrk

Hungarian

Good morning - Jó Reggelt

Good evening - Jó Estét

Bon Appetite - Jó étvágyat

How are you? - Hogy vagy?

What's the time? - Mennyi az idő?

Why did czech president Vaclav Klaus steal the pen? - A cseh elnök, Vaclav Klaus miért lopta el a tollat?

Python
GoodMorning = "Good morning"
GoodEvening = "Good evening"
BonAppetit = "Bon Appetit"
HowAreYou = "How are you?"
WhatsTheTime = "What's the time?"
WhyDidCzechPresidentVaclavKlausStealThePen = "Why did czech president Vaclav Klaus steal the pen?"

Polish

Good morning - Dzień dobry

Good evening - Dobry wieczór

Bon Appetite - Smacznego

How are you? - Jak się masz?

What's the time? - Która godzina?

Why did czech president Vaclav Klaus steal the pen? - Dlaczego czeski prezydent Vaclav Klaus ukradł długopis?

Portuguese Brasil

---:
Good morning - Bom dia
Good evening - Boa tarde
Bon Appetite - Bom apetite
How are you? - Como está?
What's the time? - Que horas são?
Why did czech president Vaclav Klaus steal the pen? - Porque é que o presidente Vaclav Klaus roubou a caneta?

(Brazilian Portuguese) Português brasileiro

Good morning - Bom dia
Good evening - Boa tarde
Bon Appetite - Bom apetite
How are you? - Como você está?
What's the time? - Que horas são?

Australian.

Good morning - G'day fuckwit.
Good evening - Night cunt.
Bon Appetite - This crap's pretty alright.
How are you? - How the fuck are ya?
What's the time? - Gimme the time, mate.
Why did czech president Vaclav Klaus steal the pen? - Why'd that dickhead Vaclav Klaus steal that fucking pen?