It is a very good tool. I checked the string encoding error and the tool find a lot of error. 4532 errors in 808 string. All for the dialogues in Spanish exception de last one that it is in English.
I hope that this can help for it is necessary to fix some errors.
Additionally I am doing a new installation all in English
I copy one line error (the file is very heavy to load here)
Number of hits: 4532
String table: dialog.tlk, StringRef: 346937 /* Cuando la Palabra de Poder es pronunciada, todas las criaturas a 8 metros del objetivo deben realizar una tirada de salvaci�n contra varitas o sufrir un angustioso dolor durante 2-8 asaltos que penaliza en 4 puntos el THACO y en 1 la clase de armadura. El conjuro s�lo puede usado una vez al d�a, y durante su ejecuci�n, el lanzador esta obligado a llevar el amuleto en la mano. ESTAD�STICAS: Habilidad ofensiva: Todos los enemigos a 8m o menos son penalizados con -4 al THACO y -1 al AC durante 2-8 asaltos. Salvarse vs. varitas anula efectos. Las criaturas con resistencia m�gica son inmunes */, Error message: Malformed input data found at offset 123, length: 1 byte
And copy the only one in English
String table: dialogf.tlk, StringRef: 422718 /* Ofelix was an adventurer from the far north of Faer�n. He was from a tribe of barbarians that made a point of ignoring outsiders - even when invaders overran their lands. They maintained their independence even in servitude, never abandoning their language, religion or customs, against the express wishes of their conquerors. After several years of enslavement a group of warriors planned an all out attack to expel the invader. However, the insurgency was defeated and in loyalty to his homeland, Ofelix chose death above slavery and was executed. This halberd is the only artefact that remains to attest to his skill and bravery. STATISTICS: Enchantment: +2 Damage: 1d10 + 2, +4 Vs. Chaotic Opponents Thac0: +2 Bonus Damage Type: Piercing Weight: 8 Speed Factor: 8 Proficiency Type: Halberd Type: Two-Handed Requires: 9 Strength */, Error message: Malformed input data found at offset 51, length: 1 byte