I don't think sense 2 is a linguistics term.

@@ -18 +17,0 @@
-<field>&ling;</field>

https://kotobank.jp/word/アクセント-24707

@@ -10,0 +11 @@
+<field>&ling;</field>
@@ -16,0 +18 @@
+<field>&ling;</field>

OK. Leave it there. I'll adjust the sentences.

daijr (sense 1): "[...] 英語・ドイツ語などに見られる「強弱アクセント」と，日本語などに見られる「高低アクセント」との二種がある"
daijs (sense 1): "[...] 言語体系の違いによって、音の高低によるもの（高さアクセント）と音の強弱によるもの（強さアクセント）とがある"

Daijr/s includes pitch accent in sense 1. I think intonation is a separate concept. I've added some more glosses.
As for accent in the "distinctive way of pronouncing a language" sense, I don't think アクセント is typically used in that way.
The Tatoeba examples like "アクセントで彼がドイツ人だとわかる" are translations of English sentences, and they've used アクセント because there's no word in Japanese that corresponds exactly to this sense of "accent".
However, that's probably enough of a reason to include it as a sense. I think the entry looks OK now.

@@ -12,0 +13 @@
+<gloss>pitch accent</gloss>
@@ -17 +18,2 @@
-<gloss>pitch accent</gloss>
+<gloss>inflection</gloss>
+<gloss>cadence</gloss>

Daijr (2): 話し方の調子。語調。

I think "pitch accent" belongs with intonation.
Is there a missing sense for accent in general, perhaps relating to Daijirin's sense 2? Many of the Tatoeba examples refer to this, but it doesn't really fit either sense 1 or 2. Tomayto/tomarto is neither stress nor intonation. I've tentatively added this.
For アクサン the relationship is rather unclear. Sense 1 of アクサン in Daijirin simply says "アクセント" All senses?

@@ -12,0 +13,4 @@
+</sense>
+<sense>
+<pos>&n;</pos>
+<gloss>intonation</gloss>
@@ -17 +21 @@
-<gloss>intonation</gloss>
+<gloss>(language) accent (e.g. American, British)</gloss>