We know if a verb is reflexive if it ends in le true or false

Reflexive verbs are transitive verbs whose action falls on the same subject that performs them. In other words, they refer to an action of a subject on itself.  

They are used together with reflexive pronouns, which are shown below according to the personal pronoun used:

1st person singular Yo (I): me  

2nd person singular (informal) Tú (You): te    

2nd person singular (formal) Usted (You): se  

3rd person singular Él/Ella/eso/esa (He/She/It): se    

1st person plural Nosotros (We): nos  

2nd person plural Ustedes (You) (In latinAmerica): se    

2nd person plural Vosotros (You) (In Spain): os  

3rd person plural Ellos/Ellas (They): se  

Now, Reflexive pronouns are located:

1. before a verb in any of its personal forms, for example:

La niña se peina

The girl combs

2. before the imperative in negative form and following the affirmative imperative, for example:

¡No te peines!

Do not comb!

¡Apúrate!

Hurry up!

¡Apúrale!

Hurry!

3. before a verbal periphrasis or behind the infinitive of it, for example:

Ella va a casarse

She is going to get married

Ella se va a casar

She is getting married

4. in the formula to be + gerund, the pronoun can also go before or after, for example:

Ella está peinándose

She is combing her hair

Ella se está peinando

She is combing her hair

So, as you can see, a reflexive verb may end in le, me, te, se, nos, os, not only in le.

Therefore, if a verb ends in le, it may be a reflexive verb, but this is not the only rule to identify it.