Don't duplicate documentation between the README and add_language.

README.md

@@ -10,8 +10,6 @@
 - [Testing](#testing)
 - [Installing](#installing)
 - [Documentation](#documentation)
-- [Building Voices](#building-voices)
-- [Adding New Voices](#adding-new-voices)
 - [Praat Changes](#praat-changes)
 - [eSpeak for Android](#espeak-for-android)
 - [Historical Versions](#historical-versions)
@@ -192,27 +190,6 @@ on using and creating voices/languages for for eSpeak NG.
 The [espeak-ng](src/espeak-ng.1.ronn) command-line documentation provides a
 reference of the different command-line options available, with example usage.
 
-## Building Voices
-
-If you are modifying a language's phoneme, voice or dictionary files, you
-can just build that voice by running:
-
-    make <lang-code>
-
-For example, if you add entries in the `dictsource/en_extra` file, you can
-run:
-
-    make en
-
-to build an English voice file with those changes in without rebuilding
-all the voices. This will make it easier to spot errors.
-
-## Adding New Voices
-
-In order to build a new voice with eSpeak NG, you need to update the
-`Makefile.am` file with the relevant dependency information. You can find
-out how to do this by looking at other voices in that file.
-
 ## Praat Changes
 
 The `praat` program is used to create and edit the spectral data files for

docs/add_language.md

@@ -130,6 +130,10 @@ the `fr_rules` and `fr_list` sources by the command:
 
 	espeak-ng --compile=fr
 
+or by:
+
+	make fr
+
 Details of the contents of the dictionary files are given in
 [Dictionary](dictionary.md).