I did not know that additional log 
So here are the results (ech time the XMP file has been deleted before starting dt and importing the image):
ENGLISH SYSTEM LOCALE, ENGLISH USER LOCALE
version: darktable 2.3.0+1049~g909d17612-dirty
start: 2017:11:20 09:24:38
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLatitude: 40/1 44086333/1000000 0/1
Exif.GPSInfo.GPSLatitudeRef: N
latitude:40,734772
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLongitude: 74/1 10348666/1000000 0/1
Exif.GPSInfo.GPSLongitudeRef: W
longitude: -74,172478
FRENCH (FRANCE) SYSTEM LOCALE, FRENCH(FRANCE) USER LOCALE
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLatitude: 40/1 44086333/1000000 0/1
Exif.GPSInfo.GPSLatitudeRef: N
latitude:40,734772
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLongitude: 74/1 10348666/1000000 0/1
Exif.GPSInfo.GPSLongitudeRef: W
longitude: -74,172478
ENGLISH (US) SYSTEM LOCALE, FRENCH(FRANCE) USER LOCALE
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLatitude: 40/1 44086333/1000000 0/1
Exif.GPSInfo.GPSLatitudeRef: N
latitude:40,734772
filename: 2cad3a0b67fcc21a747f9135a83ca2fdbbef0db8.JPG
Exif.GPSInfo.GPSLongitude: 74/1 10348666/1000000 0/1
Exif.GPSInfo.GPSLongitudeRef: W
longitude: -74,172478