French voicing affects the Voice Onset Time and the fundamental frequency in Kera. Production and perception experiments show phonological changes according to location and gender. Village speakers maintain a 3-way tonal contrast while town speakers have 2 tones and a VOT contrast. The contact influences both L1 and L2. Yet they maintain distinct phonetic settings for the two languages. In tone production, village women are more conservative than village men, while the women in town are the least conservative with almost total loss of tone. We will briefly consider contact effects on French vowels and the introduction of loan words from Tupuri, Arabic and French.