Undoubtedly these figures are very meager and unreliable. But the readiness with which the Germans appear to have adopted the language and customs of the Romans would tend to prove that the invaders formed but a small minority of the population. Since hundreds of thousands of barbarians had been assimilated during the previous five centuries, the great invasions of the fifth century can hardly have made an abrupt change in the character of the population. [Sidenote: Contrast between spoken and written Latin.] The barbarians within the old empire were soon speaking the same conversational Latin which was everywhere used by the Romans about them.[21] This was much simpler than the elaborate and complicated language used in books, which we find so much difficulty in learning nowadays. The speech of the common people was gradually diverging more and more, in the various countries of southern Europe, from the written Latin, and finally grew into French, Spanish, Italian, and Portuguese. But the barbarians did not produce this change, for it had begun before they came and would have gone on without them. They did no more than contribute a few convenient words to the new languages. The Germans appear to have had no dislike for the Romans nor the Romans for them, except as long as the Germans remained Arian Christians. Where there was no religious barrier the two races intermarried freely from the first. The Frankish kings did not hesitate to appoint Romans to important positions in the government and in the army, just as the Romans had long been in the habit of employing the barbarians. In only one respect were the two races distinguished for a time,--each had its particular law. [Sidenote: The Roman and the German law.] The West Goths in the time of Euric were probably the first to write down their ancient laws, using the Latin language. Their example was followed by the Franks, the Burgundians, and later by the Lombards and other peoples. These codes make up the "Laws of the Barbarians," which form our most important source of knowledge of the habits and ideas of the Germans at the time of the invasions.[22] For several centuries following the conquest, the members of the various German tribes appear to have been judged by the laws of the particular people to which they belonged. The older inhabitants of the Empire, on the contrary, continued to have their lawsuits decided according to the Roman law. This survived all through the Middle Ages in southern Europe, where the Germans were few. Elsewhere the Germans' more primitive ideas of law prevailed until the thirteenth or fourteenth century. A good example of these is the picturesque mediæval ordeal by which the guilt or innocence of a suspected person was determined. [Sidenote: Mediæval trials.]