The verb "lauten" cannot be used as a synonym of "sein", if it doesn't aim at a specific name. So for example

correct: Ich bin müde. = I am tired.
incorrect: Ich laute müde. = no sense
incorrect: Ich heißt müde. = My name is "Müde".

 

correct only with quotation marks, even then rather uncommon: Mein Gemütstzustand ist „müde“. = My mood is "tired".
correct: Mein Gemütszustand heißt „müde“. = My mood is called "tired".
correct: Mein Gemütszustand lautet „müde“. = My mood is called "tired".

The verb "lauten" cannot be used as a synonym of "sein", if it doesn't aim at a specific name. So for example

correct: Ich bin müde. = I am tired.
incorrect: Ich laute müde. = no sense
incorrect: Ich heißt müde. = My name is "Müde".

correct only with quotation marks, even then rather uncommon: Mein Gemütstzustand ist „müde“. = My mood is "tired".
correct: Mein Gemütszustand heißt „müde“. = My mood is called "tired".
correct: Mein Gemütszustand lautet „müde“. = My mood is called "tired".

The verb "lauten" cannot be used as a synonym of "sein", if it doesn't aim at a specific name. So for example

correct: Ich bin müde. = I am tired.
incorrect: Ich laute müde. = no sense
incorrect: Ich heißt müde. = My name is "Müde".

correct only with quotation marks, even then rather uncommon: Mein Gemütstzustand ist „müde“. = My mood is "tired".
correct: Mein Gemütszustand heißt „müde“. = My mood is called "tired".
correct: Mein Gemütszustand lautet „müde“. = My mood is called "tired".

The verb "lauten" cannot be used as a synonym of "sein", if it doesn't aim at a specific name. So for example

correct: Ich bin müde. = I am tired.
incorrect: Ich laute müde. = no sense
incorrect: Ich heißt müde. = My name is "Müde".

correct only with quotation marks, even then rather uncommon: Mein Gemütstzustand ist „müde“. = My mood is "tired".
correct: Mein Gemütszustand heißt „müde“. = My mood is called "tired".
correct: Mein Gemütszustand lautet „müde“. = My mood is called "tired".