Friend,

I could not find a specifically Spanish-speaking Reformed church in Tyler, but that does not mean there is not one. I would suggest contacting the folks at Fifth Street PCA in Tyler and asking them for help:

http://www.5thstpca.com/

I say this because they are a member of BEAMM, which is a PCA Hispanic outreach in the Southwestern states:

http://www.beamm.org/

They may well be able to help.

Theo