Nearly all if they are taken from an Italian master. But some are taken from French (Ognuno per se) or English (Il mercenario) masters. some of these few may also have not Italian audio.
And some (like Hate thy Neighbour) were prepared with at least a German title (rest of the credits were still in Italian), but that was done by the Italian distributor, who also had paid for the German dub.
So I would say (without checking) with a few exceptions nearly all have the original credits.
Quei disperati che puzzano di sudore e di morte/A Bullet for Sandoval
I giorni della violenza/Days of Violence
Per pochi dollari ancora/Fort Yuma Gold
Keoma
Django il bastardo/The Stranger’s Gundown
Un dollaro bucato/One Silver Dollar
I vigliacchi non pregano/Cowards Don’t Pray
California
Professionisti per un massacro/Professionals for a Massacre
I crudeli/The Hellbenders
Il momento di uccidere/The Moment to Kill
Il ritorno di Ringo/The Return of Ringo
El Desperado/The Dirty Outlaws
The “pursuers” are Il prezzo del potere/The Price of Power, Quel caldo maledetto giorno di fuoco/Gatling Gun, Quella sporca storia nel West/Johnny Hamlet, Una pistola per cento bare/A Gun for One Hundred Graves and Il suo nome gridava vendetta/A Name That Cried Revenge.
Among the 36 I’ve seen till now in my opinion the worst are Il tredicesimo è sempre Giuda/Thirteenth Is a Judas, Dinamite Jim and Lo chiamavano Verità/They Call Him Veritas, a sort of comedy with an unexpected good idea towards the end and a few scenes taken from Fernando Cicero’s Professionals for a Massacre.
I’ve seen only about 10 from the list in the first post, but this is for me one of the most interesting themes in SWs (so I guess I’ll go digging into that list). From what I’ve seen I think that the aftermath of Civil War, not the War itself, was more often used as a theme. This can be easily interpreted as comment on Italian situation and not just Italian, but the stories can be applied on many European post-war countries (like say Yugoslavia/Croatia), and this is precisely why these SWs appeal to me.
In some the (post-)War theme is just loosely used in the background, in some it is more in the center of the focus. For example, Return of the Ringo is more Greek tragedy than it is comment on Civil or WWII war. Post-war theme is explored more deeply in One Silver Dollar, which was for me best part of the otherwise silly movie.
My favorite among these is Cowards don’t pray, aftermath of the war is here THE theme of the movie, and many aspects of it are interestingly explored (PTSD, rebuilding of society, law and order vs outlaw guerrilla, etc.)
The order would go something like this , but its a real close call between the first two, the hellbenders just edging California.
1.The Hellbenders
2. California
3…The Dirty outlaws
4. The Tramplers
5. Kill and Pray
6. Machine Gun Killers
7. Fort Yuma Gold
8. Price of Power
9 .Kill them All and Come Back Alone
10. Return of Ringo