Spanish

1.yes = Sí
2.no = No
3.thank you = Gracias
4.please = Por favor (in Spain, when we use slang amost young people we can say plis which is the English please with a Spanish pronounciation... But it's mostly used in informal context so I wouldn't recommend you to use it with people you don't know haha)
5.no problem = No pasa nada
6.excuse me = Perdona (informal)/Perdóneme (when you're talking to someone with respect)
7.sorry = Lo siento/Perdona
8.i don't know = No lo sé/Ni idea
9. pardon? = ¿Perdona? (Yes we use perdona a lot lol)
10. you're welcome = De nada
11. what = ¿Qué?
12.why = ¿Por qué?
13.when = ¿Cuándo?
14.where = ¿Dónde?
15.how = ¿Cómo?

greetings:-
1.hello = Hola
2.nice to meet you = Encantado (boy), encantada (girl)/ Encantado/a de conocerte
3.how are you = ¿Cómo estás?/¿Qué tal te va?
4.my name is...= Me llamo ...
5.i'm from... = Vengo de.../ Soy de.../ When talking about nationality, you can just use this: Soy (insert nationality here) ex: Soy estadounidense (I'm from the US)
6.i live in... =  Vivo en ... 
7.see you later = Nos vemos/Hasta luego
8.take care = Cuídate 
9.congratulation = Felicidades
10.good morning = Buenos días
11.good afternoon = Buenas tardes
12.good evening = It doesn't exist actually
13.good night = Buenas noches
14.happy birthday = Feliz cumpleaños, but when you're congratulating the person most people just say Felicidades actually
15.happy new year = Feliz año nuevo
16.merry christmas = Feliz Navidad
17.happy easter = Felices Pascuas

romance:-
1.you're beautiful = Eres hermoso/a / Estás precioso/a
2.you're handsome = Eres guapo (boys only)
3.i love you = This is quite a tricky one tbh. Te quiero is the most used one, it's some equivalent of I love you in English but it actually translates as I want you. It's the kind of word you say to your boyfriend/girlfriend or bestfriend/friends and family. There's also Te amo but that one is really strong. You just say that to your couple and it means that you really, really love that person. Te amo it's not something you'd say to your friends or family haha. It has a strong passionate and romantic meaning. I like that aspect of Spanish, like there's a I love you for the people you love like your friends and family but there's that I love you for that one person :D
4.i miss you = Te echo de menos / Te extraño (Te he echado de menos by Pablo Alborán is a great song to learn this word! He however uses the verb in a past tense -he says I/I've missed you- but nevermind, it's a great way to learn it haha)

5.i need you = Te necesito

date:-
1.sunday = Domingo
2.monday = Lunes
3.tuesday = Martes
4.wednesday = Miércoles
5.thursday = Jueves
6.friday = Viernes
7.saturday = Sábado

numbers:-
1.one = Uno
2.two = Dos
3.three = Tres
4.four = Cuatro
5.five = Cinco
6.six = Seis
7.seven = Siete
8.eight = Ocho
9.nine = Nueve
10.ten = Diez

Portuguese

1.yes = Sim (Tricky to pronounce)
2.no = Não (Trickier than the previous one...)
3.thank you = Obrigado for males and Obrigada for girls. When someone speaks Portuguese fast it mostly just sounds like 'brigado/'brigada 
4.please = Se faz favor/Por favor
5.no problem = Não há problema
6.excuse me = Desculpa (informal)/Desculpe (when you're talking to someone with respect)
7.sorry = Desculpa
8.i don't know = Não sei/Não faço a mínima (ideia) Technically you're supposed to say não faço a mínima ideia altogether but when you're talking you can comit ideia a lot lol. So you can use ideia or not. It's up to you.
9. pardon? = Desculpa? (YES PORTUGUESE AND SPANISH HAVE AN OBSESSION WITH PERDONA AND DESCULPA AND YOU KNOW WHAT THEY ACTUALLY ARE THE SAME WORD LOL XDDD)
10. you're welcome = De nada/Não há de quê/Não tem de quê
11. what = Quê?/O quê?
12.why = Por quê?
13.when = Quando?
14.where = Onde -> To where is Aonde
15.how = Como?

greetings:-
1.hello = Olá/Oi (Oi is mostly only used in Brazilian Portuguese! In Portugal it's weird to hear oi although it's become more normal due to the big Brazilian population living in the country and the popularity of Brazilian telenovelas)
2.nice to meet you = Um prazer (literally translates as a pleasure) / Um prazer conhecer-te (in an informal context like when meeting a friend of a friend) or Um prazer conhecé-lo/a (in a formal context)
3.how are you = Como estás?/Como andas?
4.my name is...= Chamo-me ... (Me chamo ... in Brazilian dialect)
5.i'm from... = Venho de .../ Sou de .../ Just like in Spanish, when talking about nationality, you can just use this: Sou (insert nationality here) ex: Sou brasileira (I'm brazilian -female-)
6.i live in... =  Vivo em ... 
7.see you later = Até logo!
8.take care = Cuida-te/Tem cuidado
9.congratulation = Parabéns
10.good morning = Bom dia
11.good afternoon = Boa tarde
12.good evening = It doesn't exist actually, just like in Spanish
13.good night = Boa noite
14.happy birthday = Feliz aniversário, but it's very unlikely you'll hear this. You just say Parabéns
15.happy new year = Feliz ano novo
16.merry christmas = Feliz Natal/Bom Natal
17.happy easter = Feliz Páscoa

romance:-
1.you're beautiful = És lindo/a
2.you're handsome = És giro/bonito (boys only)
3.i love you = Amo-te (Te amo in Brazilian Portuguese)
4.i miss you = Tenho saudades tuas/Tenho saudades de ti (I just had a brainfart to be honest and I can't really remember if you can say it in any other way lol)

5.i need you = Preciso de ti

date:-
1.sunday = Domingo
2.monday = Segunda(-feira) (Okay so let me explain this to you. ALL week days except for Saturday and Sunday are something-feira. The correct and standard form is the something-feira, BUT in actual spoken Portuguese most people -if not everyone lol- skips the feira part, so, if you're talking in a context in which is obvious you're referring to the week day, you can just say, for example, Segunda).
3.tuesday = Terça(-feira)
4.wednesday = Quarta(-feira)
5.thursday = Quinta(-feira)
6.friday = ta(-feira)
7.saturday = Sábado

numbers:-
1.one = Um
2.two = Dois
3.three = Três
4.four = Quatro
5.five = Cinco
6.six = Seis
7.seven = Sete
8.eight = Oito
9.nine = Nove
10.ten = Dez