Add tertiary translator

TranslateWord2 passes translator2 as tr to TranslateWord which may call
TranslateWord3, SpeakIndividualLetters, TranslateLetter, which was calling
SetTranslator2 again, thus freeing the very tr being used. Make that
latter use another translator.

src/libespeak-ng/numbers.c

 		if (tr->translator_name == L('e', 'n'))
 			return; // we are already using English
 
-		SetTranslator2(ESPEAKNG_DEFAULT_VOICE);
-		if (Lookup(translator2, &single_letter[2], ph_buf3) != 0) {
+		SetTranslator3(ESPEAKNG_DEFAULT_VOICE);
+		if (Lookup(translator3, &single_letter[2], ph_buf3) != 0) {
 			// yes, switch to English and re-translate the word
 			sprintf(ph_buf1, "%c", phonSWITCH);
 		}
 				// don't say "superscript" during normal text reading
 				Lookup(tr, modifier, capital);
 				if (capital[0] == 0) {
-					capital[2] = SetTranslator2(ESPEAKNG_DEFAULT_VOICE); // overwrites previous contents of translator2
-					Lookup(translator2, modifier, &capital[3]);
+					capital[2] = SetTranslator3(ESPEAKNG_DEFAULT_VOICE); // overwrites previous contents of translator3
+					Lookup(translator3, modifier, &capital[3]);
 					if (capital[3] != 0) {
 						capital[0] = phonPAUSE;
 						capital[1] = phonSWITCH;
 				ph_buf2[0] = 0;
 				if (Lookup(translator, alphabet->name, ph_alphabet) == 0) { // the original language for the current voice
 					// Can't find the local name for this alphabet, use the English name
-					ph_alphabet[2] = SetTranslator2(ESPEAKNG_DEFAULT_VOICE); // overwrites previous contents of translator2
-					Lookup(translator2, alphabet->name, ph_buf2);
+					ph_alphabet[2] = SetTranslator3(ESPEAKNG_DEFAULT_VOICE); // overwrites previous contents of translator3
+					Lookup(translator3, alphabet->name, ph_buf2);
 				} else if (translator != tr) {
 					phontab_1 = tr->phoneme_tab_ix;
 					strcpy(ph_buf2, ph_alphabet);
 			char hangul_buf[12];
 
 			// speak in the language for this alphabet (or English)
-			ph_buf[2] = SetTranslator2(WordToString2(language));
+			ph_buf[2] = SetTranslator3(WordToString2(language));
 
-			if (translator2 != NULL) {
+			if (translator3 != NULL) {
 				if (((code = letter - 0xac00) >= 0) && (letter <= 0xd7af)) {
 					// Special case for Korean letters.
 					// break a syllable hangul into 2 or 3 individual jamo
 					p3[6] = ' ';
 					p3[7] = 0;
 					ph_buf[3] = 0;
-					TranslateRules(translator2, &hangul_buf[1], &ph_buf[3], sizeof(ph_buf)-3, NULL, 0, NULL);
-					SetWordStress(translator2, &ph_buf[3], NULL, -1, 0);
+					TranslateRules(translator3, &hangul_buf[1], &ph_buf[3], sizeof(ph_buf)-3, NULL, 0, NULL);
+					SetWordStress(translator3, &ph_buf[3], NULL, -1, 0);
 				} else
-					LookupLetter(translator2, letter, word[n_bytes], &ph_buf[3], control & 1);
+					LookupLetter(translator3, letter, word[n_bytes], &ph_buf[3], control & 1);
 
 				if (ph_buf[3] == phonSWITCH) {
 					// another level of language change
-					ph_buf[2] = SetTranslator2(&ph_buf[4]);
-					LookupLetter(translator2, letter, word[n_bytes], &ph_buf[3], control & 1);
+					ph_buf[2] = SetTranslator3(&ph_buf[4]);
+					LookupLetter(translator3, letter, word[n_bytes], &ph_buf[3], control & 1);
 				}
 
 				SelectPhonemeTable(voice->phoneme_tab_ix); // revert to original phoneme table

src/libespeak-ng/translate.c

 Translator *translator = NULL; // the main translator
 Translator *translator2 = NULL; // secondary translator for certain words
 static char translator2_language[20] = { 0 };
+Translator *translator3 = NULL; // tertiary translator for certain words
+static char translator3_language[20] = { 0 };
 
 FILE *f_trans = NULL; // phoneme output text
 int option_tone_flags = 0; // bit 8=emphasize allcaps, bit 9=emphasize penultimate stress
 	} while (((embedded_cmd & 0x80) == 0) && (embedded_read < embedded_ix));
 }
 
-int SetTranslator2(const char *new_language)
+static int SetAlternateTranslator(const char *new_language, Translator **translator, char translator_language[20])
 {
-	// Set translator2 to a second language
+	// Set alternate translator to a second language
 	int new_phoneme_tab;
 
 	if ((new_phoneme_tab = SelectPhonemeTableName(new_language)) >= 0) {
-		if ((translator2 != NULL) && (strcmp(new_language, translator2_language) != 0)) {
+		if ((*translator != NULL) && (strcmp(new_language, translator_language) != 0)) {
 			// we already have an alternative translator, but not for the required language, delete it
-			DeleteTranslator(translator2);
-			translator2 = NULL;
+			DeleteTranslator(*translator);
+			*translator = NULL;
 		}
 
-		if (translator2 == NULL) {
-			translator2 = SelectTranslator(new_language);
-			strcpy(translator2_language, new_language);
+		if (*translator == NULL) {
+			*translator = SelectTranslator(new_language);
+			strcpy(translator_language, new_language);
 
-			if (LoadDictionary(translator2, translator2->dictionary_name, 0) != 0) {
+			if (LoadDictionary(*translator, (*translator)->dictionary_name, 0) != 0) {
 				SelectPhonemeTable(voice->phoneme_tab_ix); // revert to original phoneme table
 				new_phoneme_tab = -1;
-				translator2_language[0] = 0;
+				translator_language[0] = 0;
 			}
-			translator2->phoneme_tab_ix = new_phoneme_tab;
+			(*translator)->phoneme_tab_ix = new_phoneme_tab;
 		}
 	}
-	if (translator2 != NULL)
-		translator2->phonemes_repeat[0] = 0;
+	if (*translator != NULL)
+		(*translator)->phonemes_repeat[0] = 0;
 	return new_phoneme_tab;
 }
 
+int SetTranslator2(const char *new_language)
+{
+	return SetAlternateTranslator(new_language, &translator2, translator2_language);
+}
+
+int SetTranslator3(const char *new_language)
+{
+	return SetAlternateTranslator(new_language, &translator3, translator3_language);
+}
+
 static int TranslateWord2(Translator *tr, char *word, WORD_TAB *wtab, int pre_pause)
 {
 	int flags = 0;

src/libespeak-ng/translate.h

 
 extern Translator *translator;
 extern Translator *translator2;
+extern Translator *translator3;
 extern char dictionary_name[40];
 extern espeak_ng_TEXT_DECODER *p_decoder;
 extern int dictionary_skipwords;
 
 Translator *SelectTranslator(const char *name);
 int SetTranslator2(const char *name);
+int SetTranslator3(const char *name);
 void DeleteTranslator(Translator *tr);
 void ProcessLanguageOptions(LANGUAGE_OPTIONS *langopts);