Spanish Translation for XenForo 2.3.6

1. Some phrases have been updated to make more sense when interpreting them.
2. Fixed bugs found in the previous version
3. Translated phrases that were still in English.
4. Modified the translation copyright link.

1. Phrase updates
2. Translation of new phrases
3. Correction of phrases

• This version updates new phrases presented in the new XenForo version, and also corrects erroneous phrases found in the previous version.
• Some phrases have been updated to make more sense when interpreting them.

• Incomplete phrases corrected
• Translated phrases that were still in English