Otros

¿Bienvenido ó bienvenida?

"Bienvenida" is a noun which is often translated as "welcome", and "bienvenido" is an adjective which is also often translated as "welcome".

https://www.spanishdict.com/compare/bienvenida/bienvenido

As a greeting, it's bienvenido. [1]

¿Bien, buen ó bueno/a?

Bien is an adverb

en españolen inglés
No estoy bien.I'm not well.

[...] use it as a synonym of muy (very, really), in expressions such as these:

  • Con este frío me apetece tomar un chocolate bien caliente. (In this cold weather, I fancy having a very hot chocolate.)
  • Después de hacer ejercicio, me gusta tomar una limonada bien fresca. (After doing exercise, I like to have a very cool lemonade.)

https://study.com/academy/lesson/whats-the-difference-between-bien-buen-bueno.html

Bueno/a is an adjective

en españolen inglés
El libro es buenoThe book is good.

Buen:

The main difference with buen is that bueno must be used after the noun or verb it modifies. For instance, “La película es buena.” learning a second language

In contrast, buen always precedes a masculine noun.

https://spanishlandschool.com/bien-vs-bueno/

More info

https://spanishlandschool.com/bien-vs-bueno/ https://study.com/academy/lesson/whats-the-difference-between-bien-buen-bueno.html