The CBB

<e> with no diacritic is pronounced /ə/. It is elided with the usual rules; basically, if it is between two or fewer consonants, it elides (but is still written). /ɛ/ and /e/ are always indicated explicitly with an accented <e> or a digraph as appropriate.

There are certain consonant letters which are silent word-finally or followed by word-final <s>. These are <t d v z n>. <s> is also silent word-finally, but <ss> behaves differently. These consonants are "emergent", in that they are pronounced in liaison or appear in declension or derivation. In liaison, all the consonants listed above follow the listed sound correspondences. <s> however is pronounced /z/. All other consonants are pronounced word-finally or before a word-final <s>.

/ʁ/ is also irregular. It is pronounced word-finally unless preceded by <é>, when it is silent until brought to the surface by liaison, declension or derivation. So words like "pour", "agir" and "fièr" are pronounced with final /ʁ/. It is silent in words like "boulangér" and "aimér".

Etymological doubled consonants replaced with single counterparts (<ll> -> <l>). However, an abovementioned consonant letter is doubled if it is meant to be pronounced word-finally, but is not followed by a silent <e>. An example is <sett> (currently <sept> /sɛt/).

All the nasal-vowel sequences are pronounced as such before a consonant letter or word-finally. Before a vowel, sequences of <a e i o u> + nasal are /aN (ə)N iN ɔN yN/.

The alternations in <c> and <g> remain. <qu> for /k/ is replaced with <c>. For instance, "quatre" /katʁ/ becomes "catre". The spelling of "manquér" /mɑ̃ke/ will alternate with conjugation. The present first-person plural is spelled "mancon" /mɑ̃kɔ̃/.

The representations of /s/ and /z/ are largely taken from the current orthography, but <sc> and <t> are changed to <c> when they represent /s/. science -> cience, démocratie -> démocracie

<x> only represents /ks/ or /gz/. When it represents (normal or emergent) /z/ it is replaced by <z> (amoureux -> amoureuz). When it represents /s/, it is replaced by <ss> (soixante -> soissante). When it represents pluralization, it is replaced by <s> (chevaux > chevaus). Speaking of "amoureux", feminine words ending in /z/ are respelled with "-ze". The feminine of "amoureuz" is "amoureuze"; the feminine of "penseur" is "penseuze".

Regular plural is always represented by adding silent <s> to the end of a word. This means you get things like "amoureuzs" and "touts" instead of "amoureux" and "tous". Irregular plurals are written phonetically with a silent <s> added at the end. "égal" pluralizes to "égaus".

Feminine declensions are formed regularly by adding a silent <e> to the end of the masculine form. Irregular feminine forms are spelled phonetically with a silent <e> at the end.

The representation of word-final /ɛ̃/ is based on the pronunciation of the feminine or liaison form. If the alternation is /ɛ̃/ -> /ɛn/, write <èn> (italien/italienne -> italièn/italiène). If it's /ɛ̃/ -> /in/, write <in> (divin/divine).

/œ~ø/ is represented as <eu>, unless it is preceded by <c> or <g>, in which case it is spelled <oeu>. A little fanciful. That means "coeur" is spelled the same. "Accueil" becomes "acoeui". That's a lot of vowels, but you'll never encounter <oeu> unless it means /œ~ø/.

For representing /wa/, the choice is largely based on the current orthography.

<gn> can represent either /ɲ/ or /gn/, but that usually isn't a problem. /ɲ/ is much more common.

All Greek digraphs are respelled according to the rules above. That means <ph th rh> become <f t r>, and <ch> becomes <c~qu> or <ch> based on its pronunciation.

<y> is replaced - in native words and Graeco-Roman borrowings - with <i> (or <ii> in the case of <oy>).

<h> is only used word initially to indicate h aspiré, which prevents liaison and contraction with a word beginning with a vowel.

Non-naturalized foreign borrowings are not respelled. Graeco-Roman loans are a gray area. They get some light respelling as indicated above. The rules dictate that final /s/ be spelled <ss>, which I feel is reasonable here (i.e. campus -> campuss). I also think <-um> should be spelled <-omm> (maximum > maximomm).