I can't complain
A very common and casual way to say 'Everything's good' or 'All good'. Use this with friends or in informal situations.
Literally 'I'm walking well', this is a friendly, active way to say 'I'm doing well'. It implies things are moving along smoothly.
A slightly more formal or emphatic version meaning 'There's nothing to complain about'.
—How have you been? —I can't complain, everything is calm. And you?
—How's the new job? —All good, really. The atmosphere is good.
—Hey, Carlos, how are you doing? —Hi! I'm doing well, thanks for asking.
With health and a job, there's nothing to complain about.
'No me puedo quejar' is universally understood and used. 'Todo bien' is an extremely common, informal alternative.
'No me puedo quejar' and 'Todo bien' are the most frequent responses.
In addition to 'No me puedo quejar', you'll often hear 'Bien, gracias a Dios' ('Well, thank God'), which adds a common cultural touch.
'No me puedo quejar' is used, but 'Todo tranquilo' ('Everything is calm/chill') is a very common alternative, reflecting the local slang.
'No me puedo quejar' is standard. They might also say 'No tengo queja' ('I have no complaint'), which is slightly more direct.
Using 'No puedo quejar' instead of 'No me puedo quejar'. — The verb is 'quejarse' (to complain), which is reflexive. You must include the reflexive pronoun 'me' to indicate that the action reflects back on you. 'Quejar' by itself is not a complete verb in this context.
Saying 'No puedo reclamo'. — 'Reclamo' is a noun meaning a formal complaint or claim (like at a business). The verb is 'reclamar', but it's used for making a formal demand, not for expressing your general state of being.
Translating literally as 'Yo no soy quejando'. — This is grammatically incorrect. The correct present progressive form is 'No me estoy quejando', which means 'I am not complaining (right now)', a different meaning from the general state of 'I can't complain'.