Remove the 'dictdialect' feature.

README.md

 ----------
 
 The eSpeak NG (Next Generation) Text-to-Speech program is an open source speech
-synthesizer that supports [100 languages and accents](docs/languages.md).
+synthesizer that supports [99 languages and accents](docs/languages.md).
 It is based on the eSpeak engine created by Jonathan Duddington. It uses
 spectral formant synthesis by default which sounds robotic, but can be
 configured to use Klatt formant synthesis or MBROLA to give it a more natural

docs/languages.md

 | `gmw`       | `en-GB-x-gbcwmd`  | West Germanic         | English                     | West Midlands          |
 | `art`       | `eo`              | Constructed           | Esperanto                   |                        |
 | `urj`       | `et`              | Uralic                | Estonian                    |                        |
-| `ira`       | `fa`              | Iranian               | Persian<sup>[1]</sup>       |                        |
-| `ira`       | `fa-en-us`        | Iranian               | Persian<sup>[2]</sup>       |                        |
-| `ira`       | `fa-Latn`         | Iranian               | Persian<sup>[3]</sup>       |                        |
+| `ira`       | `fa`              | Iranian               | Persian                     |                        |
+| `ira`       | `fa-Latn`         | Iranian               | Persian<sup>[1]</sup>       |                        |
 | `urj`       | `fi`              | Uralic                | Finnish                     |                        |
 | `roa`       | `fr-BE`           | Romance               | French                      | Belgium                |
 | `roa`       | `fr`              | Romance               | French                      | France                 |
 | `poz`       | `id`              | Malayo-Polynesian     | Indonesian                  |                        |
 | `art`       | `ia`              | Constructed           | Interlingua                 |                        |
 | `roa`       | `it`              | Romance               | Italian                     |                        |
-| `jpx`       | `jp`              | Japanese              | Japanese<sup>[4]</sup>      |                        |
+| `jpx`       | `jp`              | Japanese              | Japanese<sup>[2]</sup>      |                        |
 | `dra`       | `kn`              | Dravidian             | Kannada                     |                        |
 | `inc`       | `kok`             | Indic                 | Konkani                     |                        |
 |             | `ko`              |                       | Korean                      |                        |
 | `inc`       | `or`              | Indic                 | Oriya                       |                        |
 | `cus`       | `om`              | Cushitic              | Oromo                       |                        |
 | `roa`       | `pap`             | Romance               | Papiamento                  |                        |
-| `und`       | `und-fonipa`      |                       | Phonemes<sup>[5]</sup>      | IPA                    |
+| `und`       | `und-fonipa`      |                       | Phonemes<sup>[3]</sup>      | IPA                    |
 | `zls`       | `pl`              | South Slavic          | Polish                      |                        |
 | `roa`       | `pt-BR`           | Romance               | Portuguese                  | Brazillian             |
 | `roa`       | `pt-PT`           | Romance               | Portuguese                  | Portugal               |
 | `aav`       | `vi-VN-x-south`   | Austroasiatic         | Vietnamese                  | Southern Vietnam       |
 | `cel`       | `cy`              | Celtic                | Welsh                       |                        |
 
-[1] Includes support for reading British English text.
+[1] Farsi/Persian written using English (Latin) characters.
 
-[2] Includes support for reading American English text.
+[2] Currently, only Hiragana and Katakana are supported.
 
-[3] Farsi/Persian written using English (Latin) characters.
-
-[4] Currently, only Hiragana and Katakana are supported.
-
-[5] Currently only supported using the `[[...]]` phoneme blocks.
+[3] Currently only supported using the `[[...]]` phoneme blocks.

docs/voices.md

   - [charset](#charset)
   - [dictmin](#dictmin)
   - [alphabet2](#alphabet2)
-  - [dictdialect](#dictdialect)
 
 ----------
 
 Alphabets names include: latin, cyr (cyrillic), ar (arabic). The default
 language for latin alphabet is English.
 
-### dictdialect
-
-	dictdialect <dialect>
-
-Words can be marked in the `*_list` or `*_rules` file to be spoken using
-a foreign voice. This `dictdialect` attribute can be used to specify
-which dialect of the foreign language should be used, instead of the
-default dialect. The currently available dialects are:
-
-* `en-us` (US English)  
-* `es-la` (Latin American Spanish)
-
-e.g.
-
-	dictdialect en-us
-
-This means that any words or rules which are made with `_^_EN` will be
-spoken with the US English voice instead of the default UK English
-voice.
-
 Additional attributes are available to set various internal options
 which control how language is processed. These would normally be set in
 the program code rather than in a voice file.

espeak-ng-data/lang/ira/fa-en-us

-name Persian+English-US
-language fa
-dictdialect en-us
-maintainer Shadyar Khodayari <[email protected]>
-status mature
-// This language reads Persian and English with U.S pronunciation, as  Persian uses a collection of  special characters which differs entirely from English characters.

src/libespeak-ng/voices.c

 	V_SPEED,
 	V_DICTMIN,
 	V_ALPHABET2,
-	V_DICTDIALECT,
 
 	// these need a phoneme table to have been specified
 	V_REPLACE,
 	{ "speed",        V_SPEED },
 	{ "dict_min",     V_DICTMIN },
 	{ "alphabet2",    V_ALPHABET2 },
-	{ "dictdialect",  V_DICTDIALECT },
 
 	// these just set a value in langopts.param[]
 	{ "l_dieresis",       0x100+LOPT_DIERESES },
 	{ NULL, 0 }
 };
 
-static MNEM_TAB dict_dialects[] = {
-	{ "en-us", DICTDIALECT_EN_US },
-	{ "es-la", DICTDIALECT_ES_LA },
-
-	{ NULL, 0 }
-};
-
 #define N_VOICE_VARIANTS   12
 const char variants_either[N_VOICE_VARIANTS] = { 1, 2, 12, 3, 13, 4, 14, 5, 11, 0 };
 const char variants_male[N_VOICE_VARIANTS] = { 1, 2, 3, 4, 5, 6, 0 };
 				fprintf(stderr, "alphabet name '%s' not found\n", name1);
 		}
 			break;
-		case V_DICTDIALECT:
-			// specify a dialect to use for foreign words, eg, en-us for _^_EN
-			if (sscanf(p, "%s", name1) == 1) {
-				if ((ix = LookupMnem(dict_dialects, name1)) > 0)
-					langopts->dict_dialect |= (1 << ix);
-				else
-					fprintf(stderr, "dictdialect name '%s' not recognized\n", name1);
-			}
-			break;
 		case V_MAINTAINER:
 		case V_STATUS:
 			break;