Sindarin ll vs. lth

Sometime in the late 1930s or 1940s, Tolkien introduced a sound change whereby medial lth [lθ] became the Welsh-like long voiceless ll [ꞎꞎ] as I’ve discussed in the phonetic entry: medial [mf], [nθ], [ŋx], [lθ] became [mm], [nn], [ŋg], [ll]. Some excellent Neo-Sindarinists in our community (e.g. Fiona, Elaran) have suggested that any lth in Noldorin words should be revised to ll to reflect Tolkien’s new ideas for pronunciation: N. toltha- >> tolla-.

Ancient Quenya Phonetics P9: initial [d] assimilated to following [n]

AQ. initial [d] assimilated to following [n]; [dVXn-] > [nVXn-]

In Ancient Quenya words beginning with d that had an n at the end of the first syllable, the initial d- often became n- by assimilation. This sound change was mentioned briefly in both the Outline of Phonetic Development [OP1] from the 1930s and the Outline of Phonology [OP2] from the 1950s, and was described in more detail in several other places:

Ancient Quenya Phonetics P7: [r] became [s] after voiceless stops and aspirates

AQ. [r] became [s] after voiceless stops and aspirates; [{ptkpʰtʰkʰ}r] > [{ptkpʰtʰkʰ}s]

In Ancient Quenya any r following a voiceless stop or aspirate developed into s, a sound change with nearly identical descriptions in both the Outline of Phonetic Development [OP1] from the 1930s and the Outline of Phonology [OP2] from the 1950s:

Ancient Quenya Phonetics P5: [sr] became [ss]

AQ. [sr] became [ss]; [sr] > [ss]

Tolkien described several phonetic developments for the Quenya combination sr in the history of the language. He described essentially the same phonetic developments in both the Outline of Phonetic Development [OP1] from the 1930s and the Outline of Phonology [OP2] from the 1950s: